Pasture Prep

One Size Does Not Fit All: Customizing Your Herd’s Vaccination Schedule

Fri, 22 May 2026 14:37:16 GMT

When it comes to herd health, many beef producers go to their veterinarian with a straightforward request: “Just tell me what shots to give.” Virginia Tech veterinarian John Currin understands the desire for a simple answer, but he says that mindset misses the real opportunity.

“Most of the time, people just want to know, ‘What shots do I give? Just tell me that,’” Currin says. “But if you want to get the most bang for your buck, it’s got to be tailored to your operation.”

Instead of chasing a national, one-size-fits-all vaccination calendar, Currin encourages producers to focus on the diseases that matter most in their cows and calves — and to build a written plan with their local veterinarian.

Why Do We Give Vaccines?

“The goal of any vaccination program is to increase resiliency and protection for the entire herd against certain diseases,” says A.J. Tarpoff, Kansas State University Extension veterinarian.

Vaccines are targeted challenges to the immune system to gain protection to the pathogens that cause the diseases of concern.

“Vaccines are tools producers use to reduce the risk and impact of certain infectious diseases in their cattle,” adds Russ Daly, South Dakota State University Extension veterinarian. “They work by stimulating the animal’s immune system before exposure to the disease-causing germs. As a result, when cattle are later exposed to those germs, the infection is less likely to become established or the severity and harmful effects of the disease are reduced.”

He stresses it’s important to remember vaccines only work to protect against the antigens they contain; in other words, there’s very little cross-protection with most cattle vaccines.

“Excessive germ exposures can overwhelm the action of vaccines,” he adds. “There aren’t vaccines against every important cattle health problem — so vaccines should be considered just one of several tools cattle producers should use to reduce disease risk.”

Start With Clear Goals: What Are You Trying to Prevent?

For Currin, a good vaccination program begins by identifying the most important disease risks to a herd.

“On the cow side, the overall goal is to prevent the frequent diseases — those that cause infertility and abortion,” he explains. “On the calf side, the fatal is clostridial disease, and the frequent is respiratory disease.”

That simple framework guides how he talks about herd health with producers. Cows need strong protection against reproductive losses. Calves need protection against deadly clostridial diseases and the common respiratory problems that can rob performance and survivability.

Tarpoff agrees that the goal is to protect threats against pregnancy for cows and then begin enhancing the immune system of young calves for protection against bovine respiratory disease (BRD).

“It is always important to remember that vaccines enhance protection for the herd, but an increased threat or poor management can always overcome a well-vaccinated animal’s immune system,” he stresses.

Currin encourages producers to build timing and product choices around their priorities, rather than starting with a generic list of vaccines and trying to make them fit every herd.

Same Science, Different Herds

Producers often ask for a universal vaccination schedule they can apply to any cow-calf operation. Currin says that’s not realistic — or very helpful.

“There is no one-size-fits-all vaccination program,” he says. “They’re all underpinned by the same science, but they vary for each operation based on operational goals, their past problems and the labor and facilities they have. Everyone needs a program that’s uniquely tailored to their operation.”

Regional disease pressure is a big part of that tailoring. For example, Clostridium haemolyticum (redwater) may be a serious concern in parts of the West but is not a routine threat in the East.

“There are differences across different parts of the country within diseases you’re going to be more concerned with that don’t exist in other areas,” he says. “I definitely recommend producers work closely with their veterinarian to come up with a good herd health protocol.”

Work With Your Veterinarian — and Put It in Writing

Tarpoff stresses, because of the unique management aspects of every operation, cookie-cutter recommendations that fit everyone simply don’t exist.

Currin is adamant that vaccination planning shouldn’t happen in isolation or at the farm store counter.

“I always suggest producers work with their veterinarian and/or local Extension people to come up with a good herd health protocol,” he says. “Have a written plan and periodically review that plan, because things change.”

Currin suggests the written plan should reflect:

Region-specific disease risks.
The operation’s calving season and breeding schedule.
Labor and handling opportunities.
Past herd health problems and long-term goals.

Building a Practical Schedule: Cows and Calves

While every program looks a little different, Currin uses a basic structure that can be adapted to both spring- and fall-calving herds.

On the cow side, he is a strong believer in modified-live vaccination programs, provided the herd is managed to allow safe use.

“You’ve got to have a defined calving season so that you have a time period where all the cows are open and you can vaccinate those cows with a modified-live vaccine,” Currin says.

He stresses sticking to label directions for timing. For calves, Currin targets both clostridial and respiratory disease.

“When the calves are 1 to 3 months of age, give them a separate clostridial vaccine. That’s kind of my basic youth vaccine program,” he says.

Later, he builds in a preweaning round of respiratory and clostridial protection.

According to Currin, spring- and fall-calving herds can follow the same framework; only the calendar dates change.

“While cookie-cutter recommendations don’t work, there are some common pathogen threats,” Tarpoff adds. “A 2017 survey of cow-calf veterinarians identified the most common pathogen recommendations.”

He says these recommendations include:

For the cow herd, ideally prebreeding to boost protection prior to breeding season — IBR, BVD (Types 1 and 2), lepto, PI3, BRSV and Vibrio (Campylobacter).
For calves — IBR, BVD (Types 1 and 2), BRSV, PI3 as well as a multivalent clostridial are the most common recommendations. Once closer to weaning, more veterinarians recommend including respiratory bacterins such as Mannheimia, followed by Histophilus and Pasteurella.

Don’t Forget Bulls and Replacement Heifers

Producers sometimes overcomplicate bull protocols. Currin applies what he calls the KISS [keep it short and simple] principle.

“I treat them like they’re cows. They get the same vaccination program as the cows do,” he says.

That keeps the program simple and helps ensure bulls aren’t overlooked.

Replacement heifers, on the other hand, are a special opportunity.

“The key difference is it’s a wonderful time to set them up for their lifelong herd health program,” Currin says.

Modified-Live vs. Killed Vaccines: Which is Right for You?

Daly says both killed and modified-live versions of vaccines are available for some reproductive and respiratory agents, which further factors into the decision.

“Safety, handling and timing conditions are different between both types,” he explains. “Vaccines of the same type containing the same antigens are usually offered for sale by several different animal health companies, creating another decision point.”

Daly adds the herd veterinarian can offer guidance on all those decision points.

“Their familiarity with the herd’s specific needs and with the various vaccines offered for sale make them the best source of information on which to base vaccine choices,” he summarizes.

In herds that don’t routinely use modified-live vaccines in mature cows, Currin likes to see heifers primed with modified-live products after weaning.

“If we’re not using modified-live vaccines in the cows, we can at least get a couple doses postweaning in those heifers,” he explains. “There’s really good evidence that priming those calves with modified-live vaccines has positive impacts as we booster them with killed products later on in life.”

He stresses it is important to not use modified-live vaccines in naïve cattle less than 30 days prior to breeding time.

Beyond Vaccines: Parasites and Flies Still Matter

Vaccines are only one part of a complete herd health program. Parasite and fly control still need to be addressed and should be built into the same veterinarian-guided plan.

“On the cow side, it’s predominantly lice and flies we’re talking about trying to control,” Currin notes. “On the calf side, it’s predominantly internal parasites — worms — and then, to some extent, flies.”

Fly control can be an ongoing challenge for beef producers.

“I’ve decided that flies are smarter than me,” Currin says jokingly. “Fly control is difficult because of animal-handling times and resistance of flies to many of our commonly available products. Producers should plan on a multifaceted approach involving at least two things to try to control flies.”

He points to four broad tool categories: fly tags, pour-ons, backpack sprayers, and insect growth regulators in the mineral. But he cautions that no program will work forever.

“They have to be prepared to adjust their program every couple of years, because what worked last year will not necessarily work this year,” he adds.

The Bottom Line: Use the Science, But Customize the Plan

For Currin, the message to producers is straightforward: The vaccines and the science are widely available, but the real value comes from how they’re applied on your specific operation.

“Every herd has different needs regarding disease risks and labor availability throughout the year,” Daly summarizes. “While there are some basics that should be followed for all herds, the choice of vaccines and their timing can vary widely between herds — even those across the fence from each other. This makes timely consultation with the herd veterinarian even more important.”

No matter herd size or location, a good vaccination program starts with understanding your herd’s biggest disease risks, then working with your veterinarian to develop — and regularly review — a written herd health plan that truly fits your cows, your calves and your management.

The High Cost of Haste: Why Early Pasture Turnout Could Cost You $6 a Pound

Fri, 08 May 2026 15:13:36 GMT

It’s May. The cows are restless at the sight of green grass just on the other side of the fence. Your lawn is a bright green, and pastures are becoming green. Before you decide that the pasture looks good enough to turn cattle out on, think again. This year, that decision carries more weight than ever.

Iowa State forage specialist Shelby Gruss recently joined “ Beef Collective ” host Patrick Wall on the podcast to talk through what producers should be thinking about as they prepare for spring turnout. At the top of the list: don’t turn out too early, and don’t underestimate what that decision costs you in the long run.

“The No. 1 thing it takes to grow grass is grass,” Wall notes.

Why Early Turnout Backfires

In the spring, grass looks more mature than it really is. Visually, that vibrant green signals that the grass is ready to be grazed on. Turning cattle out too early puts underdeveloped plants under pressure they cannot handle yet.

“We also think that way because spring is when our grass grows the best, typically,” Gruss says. “Typically, we think, ‘Oh, we’ll get ahead of it by doing this.’ But we’re actually just starting off on a bad foot in general.”

That above-ground growth sets up pastures for success. Turning out too early, combined with continuous grazing of the same plants, does not give grass a chance to fully develop.

“If we turn out too early, especially this year, with producers saving more heifers and trying to expand, we’re going to put ourselves behind the eight ball before we ever hit peak growing season,” Wall says.

What “Ready” Actually Looks Like

Gruss recommends a minimum 10-inch height benchmark for grass in continuous grazing systems. That height gives the plant enough leaf area to continue photosynthesizing even while cattle are actively grazing. In operations that use rotational grazing, cattle can be turned out on shorter grass but must be moved more quickly to avoid eating the grass down in one pasture.

“The plant uses photosynthesis; you have to have above-ground growth to support the whole plant,” Gruss explains.

Sunlight captured in the blades of the grass is transformed into nutrients and energy to support healthy grass. When cattle graze a plant too low, they strip away the leaf area the plant needs to capture sunlight. Without that above-ground growth working to support it, the plant essentially has to start over. That recovery draws from the root reserves, weakening the plant over time and reducing overall pasture production.

“If we’re constantly hitting it, we are not giving that plant an opportunity to grow and keep producing,” Gruss says.

Hay as a Management Tool

In this season, carryover hay is widely available and affordable. Feeding hay to keep cattle off grass can be used as a bridge strategy.

“A cow is smart enough — and dumb enough — that if you put dry hay and green grass in front of her, she’s going to nub down whatever’s growing before she touches the bale,” Gruss adds.

Before turning cattle out on grass, ensure they are full and not ready to eat everything in front of them. This will slow down their excitement to graze on grass while supporting the grass growth, recommends Gruss.

For producers tempted to split the difference, Gruss suggests a stair-step approach. Turn cattle out for a limited time, bring them back in and shut them off the pasture, then feed hay until the grass is ready to handle the pressure of the herd grazing.

The Financial Stakes

“Every pound that calf gains on the side of that cow this year has been historically worth about $5 to $6 right now per pound. You can’t make any hay that’s ever worth $5 to $6
a pound,” Wall says.

Producers who mismanage spring turnout risk shortening their grazing season, reducing the number of grazing days available in the most valuable time in the cattle market in a generation. Using a stair-step approach supports the grass for grazing throughout the whole season.

Have a Plan

No season goes perfectly. Between weather and the market, many factors are out of our control. Choosing when to turn out cattle to graze this spring, however, is within our control. Producers who have thought ahead of the season and prepared a backup plan will have the most gain while protecting their pasture.

“Grazing is the cheapest option that we can have,” Gruss summarizes. “If we manage them like we manage our corn or soybeans, we’re going to get the most productivity that we can.”

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Re-imagining the Ranch: How Virtual Fencing is Turning "Moonscapes" into Profitable Pastures

Fri, 08 May 2026 12:53:26 GMT

U.S. beef producers are using virtual fencing to create pastures this summer where none existed last year. They also are using the tool to create business opportunities for themselves.

Canda Mueller is a third-generation cow-calf producer in western Oklahoma. Growing up in the business, Mueller has the experience and the space to raise cattle. Whether she could do so profitably was another question. Years of weather extremes have taken a toll on the land and the quality of forage available. Some areas on her 640 acres looked more like a moonscape than a pasture, Mueller explains.

“We’ve seen so many things happen in the extreme weather of western Oklahoma,” she says. “Using virtual fencing, we’re reimagining how we fence cattle and how we move them from place to place. We’re able to correct or improve how we did things in the past when we didn’t have the tools or the knowledge we have now.”

Five years ago, Mueller started being more intentional about where she placed bales on the quarter of the property she lives on. She placed bales on areas with poor soil quality to draw cattle to the sites despite the lack of forage. As the cattle eat the bales, bits of uneaten hay become mulch for the soil, and their manure provides nutrients. Even their saliva feeds the soil microbiome to improve it for future forage growth.

“Anything they leave behind is good cover and protection for the soil,” Mueller says. “I’m creating a plan so I don’t have to apply fertilizer. The cows put as much back into the ground as I’m taking out.”

Mueller could see improvement in the areas she was bale grazing, so she kept at it. Two years ago, she started intentionally rotational grazing across her property to rest the pasture she had been working on.

“I realized virtual fencing made more sense than moving hot wires or investing in traditional barbed fencing,” Mueller says. “Hot wire, in particular, wasn’t working because the ground was too dry for the cattle to pay attention to it.”

Instead of fencing, Mueller draws paddock boundaries using an app on her phone or a platform on her laptop. Her cows wear GPS-enabled collars that deliver audio cues to encourage them to return to the herd if they approach the boundaries. If a cow continues to the boundary, the collar delivers a mild electrical pulse to reinforce the audio cue. After a seven- to 10-day controlled training period, the majority of cattle respond to the audio cues and never need the pulse.

Virtual fencing also made another forage improvement tactic possible: multispecies grazing. Mueller has been impressed with the results. Grazing goats alongside her cattle has made it faster and easier to improve forage quality. The goats eat small elm trees and other problematic brush that cows won’t eat, and they help in the ongoing battle against cedar trees, which consume a lot of water, Mueller says. The goats’ smaller hooves create divots that help pull water into the dry ground in the case of rain.

“They have made a big difference on the ground and improving the soil to improve grazing for the cattle,” Mueller says.

Melanie Jacobs, owner of Heritage Hooves, raises Pinewoods cattle on 200 acres north of Birmingham, Ala., and markets beef to consumers. She uses Nofence virtual fencing to grow her grazing program without adding physical fences and to rotate cattle through paddocks or bring them to a corral for handling.

(Nofence)

New Business With an “Old” Breed

Across the country, Melanie Jacobs is also reimagining what raising beef cattle can look like. Jacobs and her husband, Johnny, raise Pineywoods cattle on 200 acres about 60 miles north of Birmingham, Ala., and market beef directly to consumers. They did not plan to get into the beef business when they bought the property.

“We always said we would not have cattle,” Jacobs says. “Dad’s cows were always getting out, and there were so many challenges. I had no interest in doing that kind of work.”

However, the Jacobses agreed to take two Pineywoods cows and a donkey when they took over the property. Despite themselves, they fell in love with the livestock.

Virtual fencing helped turn that love into a business. Pineywoods cattle are hardy and low maintenance, which is a good fit for the rocky, hilly property. They are a heritage breed tied to the history of the Southern U.S., and Jacobs has joined a network of Pineywoods breeders who share what they learn with each other.

Jacobs was preparing to graze cattle rotationally in a large pasture and wanted to graze them for a short time in a wooded area to help manage brush. A neighbor’s harvested cornfield kept catching her attention, and she wanted to find a way to include it in her grazing plan.

“The physical fences around the field were in poor condition, and it felt like wasted opportunity,” Jacobs says. “Using virtual fencing, we added that cornfield into our rotation without having to build a new fence. We improved how we graze without adding inputs.”

Flexibility Empowers Success

Mueller and Jacobs appreciate how the virtual fencing system sends alerts to changes in cattle behavior. They can see when a cow separates herself from the herd and stops grazing, indicating she might be starting to calve. Jacobs also uses the virtual fencing system to bring cattle to the corral when needed.

“We just cinch their virtual pasture down and bring them in close so we can get them into the corral,” she says.

Mueller can’t say enough about the value of being able to move cattle without having to dedicate time or needing to be physically present.

“I’m a consultant and travel a lot for my other job. It is so helpful to get alerts when I need to check on a cow,” Mueller summarizes. “I can move the (virtual) fence while I’m traveling. I was in Mexico last week for work, changing the boundaries and texting my significant other to check on a cow. It’s such an incredible change in how I can work, and it gives me peace of mind that my cattle are OK.”

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Why Cattle Vaccination is a Lifetime Investment in Reproductive Success

Thu, 07 May 2026 15:24:31 GMT

Cattle vaccination is more than a seasonal chore; it is a lifetime investment in reproductive efficiency. According to Dr. Becky Funk, a veterinarian at the University of Nebraska-Lincoln, producers must move beyond “automatic” vaccination and adopt an intentional, long-term strategy.

Funk was a featured speaker during the Beef Reproduction Task Force’s 2025 Applied Reproductive Strategies in Beef Cattle Symposium. She says producers should view vaccination as a long-term strategy, not just a short-term fix for the breeding season.

What is the Metabolic Cost of Vaccinating Cattle?

Vaccines are not free, either in cost or impact on cattle. There is a metabolic cost that impacts their immune response, affecting overall performance.

“Research has shown that even a single immune response requires significant energy,” Funk says. “In young calves, that energy demand can represent a meaningful portion of their daily maintenance needs.”

Why is Colostrum the Foundation of Lifetime Immunity?

Every vaccine given should be intentional, not automatic. At birth, colostrum is the foundation of immunity. Building a strong immune system for calves is critical for their productive life.

“Calves that don’t receive adequate colostrum are more likely to get sick or die early, and those that experience illness early in life are often less productive in the long term,” Funk says.

Shifting to Reproductive Protection

A lifetime of immunity is hard to reach without a strong start. By the time a heifer is ready to be bred, her immune system has already been shaped by early decisions.

“As heifers enter the breeding herd, vaccination programs typically shift to reproductive-focused vaccines,” Funk adds.

What is the Difference Between Killed and Modified-Live Vaccines?

Depending on the animal, the right vaccine matters. According to Funk, heifers and cows require different approaches.

Killed Vaccines: These are often safer for pregnant animals because they do not contain live pathogens, but they do not stimulate as strong of an immune response. As a result of dead pathogens, the immune system is more stimulated, causing a larger impact on their metabolic response. They often require a booster.

Modified-live vaccines (MLV): These contain weakened live pathogens that replicate in the animal. While they offer stronger, more complete protection, they carry a risk of causing abortions if used improperly in pregnant cattle. While MLVs can offer stronger protection, they carry more risk if misused.

Defining Your Vaccination Goals

Funk recommends selecting vaccines based on what you are specifically trying to protect:

Conception: Ensuring the cow is ready to breed.
Pregnancy: Preventing early embryonic loss.
The Fetus: Protecting the unborn calf from pathogens like BVD.
The Newborn: Ensuring the cow produces high-quality colostrum to protect the calf after birth.

Different goals result in different vaccines used. All equally important but depend on the operation.

Built Over a Lifetime

Health is a long-term investment in a cow’s productivity. Choosing the right vaccines and using them at the right time, plays a critical role in their life. That process begins before birth and continues throughout the animal’s life.

“The goal is to build a herd that’s resilient over time, not just protecting them for one breeding season,” Funk summarizes. “We’re not just vaccinating for today; we are setting these cows up for the rest of their productive life.”

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Stopping Flies in 2026: 4 Steps to Battling These Economic Pests

Wed, 06 May 2026 14:24:43 GMT

With fly season approaching, now is the time to evaluate and refine your fly management plan for 2026.

“Every year, stable and horn flies cause significant economic losses, but a good fly control program can minimize this impact,” says Cassandra Olds, Kansas State University Extension entomologist. “Although often grouped together, these are very different flies that need different control approaches.”

Dr. Ashby Green, Neogen senior technical services veterinarian, says, “If you are seeing flies, ticks, lice or insect damage to your cattle herd, we know there is an economic impact; however, that impact can become far greater than production or weight gain loss alone. Insect pressure affects grazing patterns of cattle; it affects their comfort and it can lead to health issues. Some of those health issues can be definite, such as anaplasmosis.”

The vectors responsible for spreading anaplasmosis include horse flies, stable flies and ticks. This condition has been reported in most states across the U.S., while the disease has been recognized as endemic throughout the South and several Midwestern and Western states.

Jonathan Cammack, Oklahoma State University assistant professor and state extension specialist, says, “With horn flies, we’re looking at mastitis risk, so that’s going to impact both dairy cattle and also our cow-calf operations. A lot of times, horn flies will feed on the udders of the animals, and they transfer the Staphylococcus aureus bacteria because they land on the manure, then they go back to the animal to feed and bring those bacteria with them.”

Several other conditions are propagated by flies, including pinkeye, which can be spread by face flies and causes inflammation and ulceration of the eyes. Pinkeye-affected calves are, on average, 35 lb. to 40 lb. lighter at weaning compared to healthy calves, according to a University of Kentucky report.

Cammack predicts flies are costing the U.S. cattle industry $6 billion annually in losses.

“That encompasses everything from actual loss in production due to decreased weight gain or decreased milk production, veterinary needs associated with treatment of cattle with exposure to pathogens from some of these insects, and then also the control measures associated with managing those individual fly species,” he explains.

David Boxler, Nebraska Extension livestock entomologist, says if previous control efforts underperformed, consider adjusting your approach.
“The best control method will depend on several factors including efficacy, cost, convenience and your current herd management practices,” he summarizes.

He also reminds producers that horn flies can migrate from neighboring untreated herds, masking the effectiveness of your efforts and increasing fly pressure. For this reason, Boxler recommends a comprehensive, integrated fly control.

Olds shares these tips for stopping flies, or at least reducing their impact:

Step 1: Know What You Have

“The first step in developing a good fly control program is knowing who you have,” Olds explains.

(Kansas State University)

Horn flies feed 20 to 30 times a day and stay associated with their chosen animal 24/7, with females only leaving briefly to lay eggs. Stable flies in contrast only feed once or twice a day, remaining on the host for a short period of time (3 to 5 minutes).

When not feeding, flies are resting in shaded areas such as building sides and vegetation. This short feeding time means producers often underestimate their stable fly burdens. While both flies affect pastured cattle, horn flies are not a problem in confined settings such as dairies and feedlots. This is because horn flies need fresh, undisturbed manure as a breeding site while stable flies can develop in any decaying plant matter such as hay bales, feed bunk spill over and decaying grass.

“Their populations can build rapidly and often exceed the economic injury level defined as 200 flies per animal,” Boxler adds about horn flies. “Once fly numbers surpass this threshold, cattle experience reduced weight gain and milk production due to fly-induced stress and altered grazing behavior.”

Step 2: Reduce Populations

Olds explains with either fly species, using non-insecticidal control methods is essential for slowing insecticide resistance. For horn flies, pasture burning in spring kills any flies overwintering, which can significantly reduce fly populations emerging as weather warms. A healthy dung beetle population will also significantly reduce your fly numbers for free.

“Dung beetles are very susceptible to macrocyclic lactones so avoid using injectable and pour-on avermectins (abamectin, eprinomectin, ivermectin etc.),” Olds says.
Because horn flies die within hours of being removed from cattle, non-chemical walk-through traps can be effective if animals pass through it regularly.

Step 3: Eliminate Breeding Grounds

Round hay bales result in significant wastage, which when mixed into the manure-contaminated mud around bales provides a prime breeding site for stable flies.
Olds explains each round bale can produce 200,000 stable flies.

“Reducing hay waste and spreading/drying areas around finished bales is key to reducing stable fly numbers,” she says. “In feedlots, minimizing feed spillage and waste is critical to remove breeding sites for stable and house flies.”

Parasitoid wasps are available from multiple sellers and should be released around fly breeding sites. These are very effective if released before fly populations emerge and released repeatedly through the fly season.

Be careful using insecticides if using parasitoid wasps as they are very small and sensitive to these chemicals. Keeping vegetation surrounding pen areas short and exposed will remove sheltered resting areas, making life more difficult for the flies.

Step 4: Consider Chemical Control Options

Olds stresses chemical control options should be used as a supplement not the basis of a fly control program.

(Kansas State University)

“For horn flies, insecticidal ear tags are an effective method of control if correct rotation is used,” she adds. “Rotate the chemical class of your tag annually, in year one using pyrethroid-based products, year two use organophosphate-based products and year three use macrocyclic lactone tags. Repeating this three-year cycle will reduce the selection pressure on the fly populations, slowing down the spread of resistance.”

Olds also shares these tips for effective tagging: “Tag both ears and place the tag directly into the ear. For the tag to be effective, it must come into direct contact with the animal’s skin, which is greatly reduced when daisy chained.”

Little of the tag touches the body when attached to another tag.

(Cassandra Olds, Kansas State University)

She also instructs producers not to tag young calves and adds mature bulls with thick necks might not benefit from tagging unless the tag can touch the skin.

“Although the box may label products as effective for four to five months, field trials have shown that tags only remain effective for 90 to 100 days,” Olds says. “If possible, wait until fly populations are noticeable before tagging animals to get control over peak fly activity period. After 90 days, remove the tag to reduce the risk of insecticide resistance developing.”

(Neogen)

To increase coverage, pour-ons of the same chemical class as the ear tag can be used to increase coverage.

“Be aware that a macrocyclic lactone pour-on will impact dung beetle populations,” Olds says. “Make sure animals are dosed accurately according to weight and ensure head to tail coverage. Due to their low contact time with the host and preference for the legs, topical insecticidal treatments are generally not useful against stable flies.”

Spraying the legs can provide some relief, although it should be used sparingly as most sprays are pyrethroid-based, not allowing for effective annual rotation. Baits and premise sprays can be useful in controlling both house and stable flies, look for areas where flies are found resting such as building walls, fence posts and inside sheds and shelters.

Another option is feed through insect growth regulators (IGRs) to control horn fly. Olds says it is important cattle consume the correct amount, which can be difficult under free-choice conditions.

“Under-dosing will result in resistance developing over time, reducing product efficacy,” she says. “Although labeled for stable fly control also, when manure containing the IGR is diluted in the mud and hay, it is no longer effective.”

Often marketed as dung beetle safe, Olds says evaluations of these claims in most species have not been carried out, and their true impact remains unknown.

“Insecticide resistance to IGRs can and does happen; to slow this, rotate annually between Methoprene-based (Group 7A) and diflubenzuron-based products (Group 15),” she adds.

The Veterinary Entomology website , veterinaryentomology.org/vetpestx, provides a searchable database that can help producers select the right products. Producers can select from type of animal, insect and application method.

“For on-animal use, select the best product to allow an annual rotation between pyrethroid (Group 3A), organophosphate (Group 1B) and macrocyclic lactone (Group 6) groups,” Olds says.

Green also recommends using a multi-pronged approach to insect control. He says fly tags, IGR products, pour-ons, back rubbers and dust bags can help diminish the population.

“Both back rubbers and dust bags can be highly effective if managed correctly,” Green advises. “Keep in mind, when these are put out to withstand the elements, including moisture and rain, it’s key to keep the dust fresh or the oil recharged in your back rubbers. Otherwise, they will diminish in their ability to control flies quickly.”

Cammack stresses the importance of accurate dosing by the individual animal’s weight and following label guidelines.

To best control flies and insects on cattle operations, “the easy and effective way is the best way,” Green summarizes. “It’s up to you and with the help of your veterinarian to help create that combination.”

Spot check: Small Actions Can Unlock Pasture Profitability

Wed, 06 May 2026 12:08:44 GMT

If you feel like you didn’t have enough time to prepare pastures this spring, you’re not alone. Many producers feel that once the grass starts growing, they don’t get to stop for a breath until June.

The good news is, producers still have time to make positive changes this year. Forage management is a year-round practice, and producers can do plenty of things now in early summer to improve forage performance and, in turn, cattle performance.

Forage Quality and Quantity

What looks like a beautiful, lush early summer pasture might really be too lush to provide quality nutrition. New growth forage lacks fiber. It’s high in protein, which is great for putting weight on calves, but the lack of fiber reduces the animal’s ability to absorb nutrients.

Greg Brann, a livestock producer and grazing consultant from Adolphus, Ky., encourages producers to leave a few paddocks with six inches or more of grass over winter.

(Nofence)

“In a perfect world, you would have a few paddocks that you didn’t graze hard in the fall where you left 6 inches or more of grass over winter,” says Greg Brann, a livestock producer and grazing consultant from Adolphus, Ky. “In that case, you’d have some older grass with higher fiber that can slow down the rate of passage of the fresh, new grass through the animal and allow them to absorb more nutrients.”

If last fall you weren’t able to plan to create a mix of mature and fresh grass, now is the time to make plans to do so for next year. It’s also a good time to observe the overall quantity and quality of forage in your pastures.

Observe cattle grazing patterns to monitor forage quantity. Selective grazing indicates enough forage is available that cattle can pick and choose their favorites. If cattle continue to graze during the heat of the day rather than in the morning or evening, it’s an indication that they are not getting enough forage to meet their needs.

Watch their manure to observe the forage quality, which is defined by the mix of protein and fiber. Runny manure is not desirable, nor is manure that stacks, Brann says. Manure the consistency of pumpkin pie filling indicates adequate fiber for cattle nutrition.

Looking Ahead to June

It’s early yet, but as the season progresses, Brann typically gets a lot of questions about mowing. Mowing is a useful practice to manage weeds and improve pasture quality, but it costs money, especially when fuel prices are high.

An alternative to mowing is high-density grazing by holding 40,000 lb. or more of livestock in one paddock. This tactic knocks down grass to shade out weeds, similarly to how mowing would. And it has the added benefit of fertilizing the soil with manure.

“A common practice is to control vegetation when weeds make up 20% or more of the forage mix in a pasture,” Brann says. “When I mow, I prefer to do so after grazing and not mow more than 20% of the total pasture acreage at one time.”

Brann can make quick adjustments to stocking density to meet the nutritional needs of the cattle and the growing speed of the forage because he uses virtual fencing, a tool that allows producers to manage where cattle graze without the use of physical fences.

Brann creates paddock boundaries using an app on his phone or a platform on his computer. His livestock wear GPS-enabled collars that deliver audio cues to encourage them to return to the herd if they approach the boundaries.

If an animal continues to the boundary, the collar delivers a mild electrical pulse to reinforce the audio cue. After a seven- to 10-day controlled training period, the majority of cattle respond to the audio cues and never need the pulse.

Beyond Containment

Virtual fencing does more than contain cattle. It gives producers time back in their day because they don’t have to move or repair physical fences. It also gives them data they can use to refine their pasture management plans.

For example, reviewing cattle grazing patterns in the virtual fence app or platform can help identify areas of a pasture that are being over- or under-grazed so producers can determine the cause and how to address it.

Virtual fencing gives producers something that’s hard to come by in a busy season: the option to use their time differently. Producers can choose to stop and take a breath, refine their grazing strategies or work on another aspect of their business.

Your Next Reads:

Is the Grass Ready? Rethinking Pasture Turnout Beyond the Calendar

Tue, 05 May 2026 11:07:21 GMT

As soon as pastures green up, beef producers start thinking about turnout. They don’t want to keep feeding harvested feeds any longer than needed.

Pasture turnout is an important time in a cow herd management calendar. It is critical to make sure both the forage and cattle are ready before opening the pasture gate.

Extension specialists explain it is important not to turn out just because the calendar date says it is time. Turning out too soon can result in reducing the forage production potential for the entire grazing season.

What Should Producers Consider Before Turnout?

Aaron Berger, University of Nebraska beef systems educator, says there are three things to consider ensuring a successful and safe pasture turnout:

1. Forage readiness
“The first and most crucial step is assessing grass conditions,” Berger says. “Producers should ensure there are at least three leaves present.”

This is important during drought conditions, when grass availability may be limited. Berger says turning out cattle too early can exacerbate feed shortages and potentially damage pasture vegetation.

Ron Lemenager, Purdue beef specialist, says forage height is important. He explains cool-season grasses should be at least 6” tall.

“Leaf material is critical for photosynthesis and plant recovery after grazing,” he says. “The early-season forages are typically high in water, potassium and soluble nitrogen content but low in energy. We used to refer to this as ‘washy grass.’”

The challenge here is that cattle cannot eat enough dry matter to meet their energy requirement. This is especially true for replacement heifers coming off a gaining diet to reach approximately 60% of their mature weight by the beginning of the breeding season. When turned out to lush early-season pasture, they can crash on energy and go into negative energy balance.

“This results in a reduction in the number of heifers cycling and early embryo death,” Lemenager says. “If the breeding season coincides with this energy crash, fewer heifers will become pregnant until they adapt.”

Kansas State University Extension veterinarian A.J. Tarpoff says it is important to scout pastures before opening the gate: “Be sure to check forage availability and make any stocking rate adjustments, if necessary.”

2. Water source evaluation
Water availability and quality are paramount. Berger reminds producers to carefully inspect water sources, especially during drought years.

Stock ponds, dams and dugouts may not be recharged as usual, potentially leading to poor water quality. Water with high solid content can be unsuitable for livestock consumption, making thorough assessment critical.

3. Noxious plant identification
Berger says scouting the pasture for potentially harmful plants is essential. Drought conditions can make cattle more likely to consume plants they would normally avoid. Identifying and addressing these potential hazards can prevent livestock health issues.

Get Ahead of Weeds

As winter gives way to spring and pastures begin to green up, it is critical to have a plan in place to control weeds before they become a problem. Abe Smith, Corteva Agriscience range and pasture specialist, encourages producers to get ahead of weeds this spring to set their operation up for success.

“We see long-term impacts throughout a season that if you don’t get to weeds early, we see residual effects of that later into the season,” Smith says. “This has impacts in terms of seed production or getting additional weed seeds produced if they don’t remove those weeds early in the season.”

Smith says the true benefit of managing weeds in range and pasture is really maximizing the amount of forage that producers have available, and the economic benefits play out pretty simply if producers look at pastures as pounds of grass.

“Pounds of grass correlate to pounds of beef at the end of the day,” he says. “I have generally used the math that if we remove a pound of weeds through control measures from the pasture, we can put a pound or more of grass back into the pasture.”

Lemenager says soil condition is another factor to consider.

“If it is cool and soils are water-logged, the root system is compromised,” he explains. “Additionally, hoof action on wet soils will result in pugging (deep depressions). The challenge here is that weed seeds that have accumulated and laid dormant over the years but [are] buried below the germination zone. When soils are pugged, these weed seeds are now closer to the surface and germinate.”

(Lexy Tenpenny)

Be Sure the Cow Herd Is Ready

Along with the forage, it is important to make sure the cows are ready for turnout. Tarpoff shares four tips producers should consider before sending cattle to pasture:

Perform spring herd health program
Tarpoff reminds producers of the importance of doing bull breeding soundness exams before putting the bull to work. He also encourages producers to do pre-breeding vaccinations, consider synchronization options and plan for common pasture ailments such as foot rot and pinkeye .

Make a plan for internal and external parasites
Now is the time to decide how you are going to tackle flies, ticks and internal nematodes. Berger reminds producers there are several options available to help control flies and to consider the option that works best for your management plan.

Establish summer mineral program
Tarpoff encourages producers to prepare mineral feeders and calculate needs and delivery intervals.

Check cattle identification
Be sure cattle are identified before turnout. This can include brands if required in your area or tags. Along with identification, Tarpoff shares these strategies for protecting cattle from theft: Lock gates, and don’t leave cattle penned up overnight in an easily accessible location. He also encourages producers to communicate with neighbors who share a fence line when turning out about what types of cattle are going and how the cattle are identified.

Minimize Grass Tetany Risk, and Look Out For Bloat

Lemenager encourages producers to watch for two potential health issues that can occur at grass turnout: grass tetany and bloat .

Early season lush pasture grasses are high in water content, potassium and soluble nitrogen but low in magnesium and energy content. It should be noted that pastures containing legumes provide a grazing diet that is somewhat higher in magnesium.

“ Grass tetany can be a problem, especially in older lactating cows that are less efficient in mobilizing magnesium from body stores,” Lemenager explains. “Feeding a high-magnesium mineral for several weeks prior to turnout is a standard recommendation to minimize the incidence of grass tetany.”

He reminds producers that magnesium, usually in the form of magnesium oxide, is not palatable. Therefore, it is important that mineral intake be monitored.

Lemenager says legumes are beneficial to diet quality, providing nitrogen for companion grasses and increased forage production, but lush legumes can cause bloat . As legumes advance in maturity, the risk for bloat does decrease.

(Farm Journal)

Good Fences Matter

Tarpoff says it is important to walk fence lines and scout pastures.

“Be sure to check forage availability and make any stocking rate adjustments, if necessary,” he says.

Berger adds it is important to look for fence damage, especially from winter weather and to ensure fenced-out areas remain inaccessible. He also says it is beneficial to consider potential fence-line interactions with neighboring herds.

Tarpoff encourages producers to have an open line of communications with neighbors. It’s a good idea to share, when turning out, what types of cattle are going out (yearlings, pairs, bulls) and how the cattle are identified — tags or brands.

“This open communication helps identify strays earlier,” he adds.

Through following these strategies with accurate planning and preparation, pasture turnout can be stress-free for both the producer and the cow herd.

Your Next Reads:

The Rancher-Designed Solution for Efficient Cattle Processing

Tue, 05 May 2026 16:35:28 GMT

Necessity is indeed the mother of invention, as Seth Davis discovered while working cattle on his commercial cow-calf ranch. He encountered a problem that has frustrated ranchers for years. His vaccine gun syringe was always just out of reach when he needed it, or it was in his hand when he needed his hands free for other jobs.

That moment sparked an idea. What if there was a way to free your hands while keeping the vaccine gun right where your hand expects it to be? That idea, now ready for spring processing, became the VacHolster , a rugged, hands-free vaccine syringe holster built to allow ranchers to keep their syringe clean, secure and always in reach.

“I built it because I needed it,” says Davis, founder of VacHolster. “And it turns out a lot of other ranchers need it too, as they showed us last fall. This is about making the work faster, safer and less stressful on both the livestock and humans.”

Made with heavy-duty, ranch-proof materials, the VacHolster adjusts to fit the user, protects vaccine potency, reduces needlestick risks, helps get more done with less stress on the herd and allows cattle to be worked up to 20% faster. By keeping syringes ready at hand, ranchers spend less time fumbling and more time focusing on what matters.

(VacHolster)

Ranch-Tested Benefits:

Get Your Hands Back: Free your hands for all the other jobs with confidence that your syringe will be there when you reach for it, whether you rope and drag or work ‘em through a chute.
Work Faster: No more setting syringes down or hunting for where they landed.
Reduce Stress on Livestock: Shorter livestock handling time equals less stress on you and your livestock.
Protect Vaccine Potency: Reduces exposure to sunlight, dust and damage to ensure that your vaccine provides maximum protection for your herd.
Work Safer: Reduce needlestick risk with the wraparound needle guard.
Fits You: Wear on the right side or left side and adjust to fit any size user.
Fits the Job: Strong enough to handle heat, cold, mud and daily use.

Since its launch, VacHolster has been used on more than 10,000 head of cattle and 6,000 calves. It has been worn for hundreds of miles on horseback, four-wheelers and in pickup trucks. Ranchers praise its durability, comfort and time-saving functionality.

“Very handy to be able to have hands free but still have syringes within my grasp at all times,” says Iowa rancher Nolan Hagen.

See it in action on YouTube .

Your Next Reads:

Spring Success: How Strategic Pasture Planning Boosts Annual Productivity

Mon, 04 May 2026 15:31:03 GMT

Springtime on-ranch can be a make-or-break time for the entire growing season, especially when pastures come out of dormancy and animals emerge from their low winter energy levels. This is especially true for regenerative ranches.

Putting your herd out on dormant pastures or pastures with depleted resources can negatively impact both herd health — leading to decreased body condition and overall health — and pasture health. Both of these eventualities can cause stress that lingers throughout the entire growing season.

We tapped the expertise of Travis Jones, regenerative ranching adviser for Noble Research Institute , for the top tactics his team recommends to start your high-impact grazing season off in a way that helps you finish with strong productivity, animal health and profitability.

Master the Art of Spring Monitoring

For Jones, this is the time for graziers to open their eyes.

“Spring is usually the time when grazing land producers start to monitor perennial forage growth and forage vitality coming out of dormancy,” he says.

That means it is the perfect time to evaluate past management decisions and determine what has benefited a ranch’s overall goals and objectives and what has caused challenges.

A good monitoring plan is a safe place to start, Jones says. Each spring, he encourages ranchers to get out in pastures to get eyes on the following:

Grazing enclosures
Watering systems
Photo points
Soil health systems
Grazing patterns and rotational grazing systems

In the spring, graziers should spend time diligently monitoring and tracking their grazing infrastructure and forage. Accurate data can help ranchers make better operational decisions in the following year.

(Noble Research Institute)

But monitoring shouldn’t be limited to infrastructure; observing and tracking forage is also critical.

Jones recommends keeping diligent data around the following forage observations:

Plant health and vigor
Winter precipitation
Plant species
Plant growth phase

“These are all factors that help producers stay adaptive in their management,” he says. “Current data is a must for making good grazing decisions.”

From Data Points to Pasture Profits

If the data collected during spring monitoring doesn’t give you hope for the growing season, Jones says that forage additions can be a way to course-correct for the future.

“Overall, ranch productivity can increase with a bump in forage production and quality,” he says. “Often, producers can sustain livestock production with forage additions rather than feeding hay.”

While every ranch’s unique ecosystem drives which forage additions are needed, Jones says that vibrant native systems should have multiple species of plants representing all forage groups, including:

Woody
Legume
Warm-season annual grasses
Cool-season perennial grasses

Depending on a ranch’s goals and context, interseeding a primary warm-season perennial pasture with a legume or cool-season grass can not only boost forage quality for an introduced system but also extend grazing from fall into early spring, giving a marketable advantage over others.

“For animal health, having high-quality forage after the winter months when animal energy consumption may be higher can help increase body condition and overall health,” Jones says. “Often, this early spring growth is good for building condition in bred livestock expected to give birth during the spring months.

“The more options you have regarding forage quality and availability, the more you can take advantage of opportunities in market and seasonal weather dynamics,” he adds.

High plant biodiversity contributes to overall soil health, which can enhance the resilience of pastures, giving them the power to withstand drought conditions.

Step-by-Step Tactics for Forage Enhancement

For forage additions to work in the spring, Jones says that fall planning is critical. Following these steps can help you choose the correct spring forage addition for your ecosystem, environment and ranch goals.

Test the soil — Using a traditional soil test can ensure that you have the correct soil chemistry to make your forage additions work. “Seed germination can be highly dependent on soil pH; if your pH isn’t right, you might not get the forage intended,” Jones says.
Choose a trusted seed mix — Knowing the makeup of your soil can help you choose a seed mix that works for your soil type and management style.
Start small — Investing in forage additions on your most at-risk pastures is a good way to start a forage enhancement program in a way that is cost-effective and will have maximum impact on your overall grazing plan. Additionally, at-risk pastures can often benefit from investments in soil health that forage enhancements provide.

Whatever spring changes you make to your pastures must be part of your holistic management strategy, Jones says.

“New ideas and plans should be documented and discussed for how they will impact overall ranch goals and mission,” he explains. “The beauty in capturing this data is that it establishes a baseline for future decisions.

“In our education courses, we advise ranchers to prioritize capturing data that will help make future management decisions,” he adds.

Noble Research Institute provides education resources and courses that can help regenerative ranchers capture productivity, profitability and stewardship on ranches throughout the U.S.

Your Next Read: 4 Ways to Boost Profitability Through Soil Health

BQA at the Chute: 10 Tips for Spring Calf Processing

Mon, 04 May 2026 12:58:30 GMT

Spring calf processing is a critical window for establishing herd immunity, but its success depends entirely on the details. By following Beef Quality Assurance (BQA) principles, producers can maximize vaccine efficacy and protect carcass value through precise needle selection, proper injection site placement and strict adherence to the “one-hour rule” for modified-live vaccines.

“It will soon be time to process spring-born calves, which brings up the topic of best management practices and following BQA principles for all treatments,” says Chris Clark, Iowa State University Extension and outreach beef specialist, in a recent Growing Beef Newsletter. “The overall concepts are pretty simple, but it takes attention to detail to get the most out of each treatment and to ensure our product is as safe, wholesome and palatable as possible.”

Clark shares these 10 simple reminders for spring processing:

Follow label directions for all treatments, including injections, implants, pour-ons, insecticide ear tags, etc.
Administer all subcutaneous and intramuscular injections in front of the shoulder in the injection site triangle of the neck.
Select the appropriate needle diameter and length based on the weight of the animals being treated, viscosity of products being injected and routes of administration. Needles should be small enough to minimize tissue damage but large enough to prevent bending and breaking. The diameter should be appropriate for the viscosity of the product, and the length should be appropriate for the route of administration. For young calves weighing less than 300 pounds, 18-gauge needles are reasonable for most vaccines. For subcutaneous injections, ½ inch to ¾ inch needle length should work well, and for intramuscular injections, ¾ inch to 1 inch needle length should be appropriate. Keep in mind the greater the needle gauge, the smaller the diameter and vice versa.

Recommended needle size based on animal weight, viscosity of product and route of administration.
(BQA Field Guide)
Practice injection technique and pay attention to the angle of injection and the feel of the needle within the tissue. Subcutaneous injections should be applied at approximately 45 degrees to the body and intramuscular injections should be applied at approximately 90 degrees to the body. With experience, you can learn to feel whether you are in that subcutaneous space or whether you have entered the underlying muscle.
Change needles frequently. At a minimum, needles should be changed every 10 to 15 head. Additionally, a new needle should always be applied before refilling a syringe and any bent or burred needles should be immediately replaced.
For reusable syringes, clean well after each use by thoroughly rinsing with hot water. Refrain from using soaps and disinfectants because residues of these substances can damage vaccines and reduce vaccine efficacy.
Handle vaccines with care. When using modified live vaccines, mix only what you can use in an hour. Keep vaccines at steady, reasonable temperatures and take care to avoid freezing, excessive heat and exposure to UV light. Reconstitute modified live vaccines with sterile transfer needles and roll or invert gently to mix rather than shaking vigorously.
When possible, choose subcutaneous routes of administration over intramuscular routes. Some products are labeled to be given either way and when you have the choice, choose subcutaneous. Any insertion of a needle or injection of a substance into muscle tissue will cause tissue damage, potentially impacting the quality of that product.
Document complete processing/treatment records, including animal or group identification, treatment date, products administered, withdrawal times, earliest date animals would clear withdrawal times, dose administered, route of administration, name of person administering drugs and any prescription information.
Do not mix different vaccines or drugs in the same syringe or use a syringe to administer different products without washing in between. Try to place injections at least 4 inches apart from other injections to avoid product mixing/interaction within animal tissue.

Stored Joules vs. Output Joules: What Really Powers an Electric Fence?

Mon, 04 May 2026 15:37:41 GMT

It is usually the headline spec, and bigger numbers can make a unit seem more powerful at first glance. But that number does not always tell the full story.

Stored joules represent potential energy, or the amount of energy the energizer can hold internally. Output joules represent delivered energy, or the amount of energy that actually leaves the energizer and travels through the fence under real working conditions.

That difference matters, because your fence does not operate inside the energizer. It operates across acres of land in changing, less-than-perfect conditions.

The confusion often starts with how energizers are marketed. Stored joules are easy to highlight and easy to compare on paper. But energy held inside the unit is not what controls livestock. What matters is the energy that makes it to the wire.

Why Output Joules Matter

Output joules measure the usable power your fence is truly delivering.

This is the energy that travels the length of the fence, pushes through vegetation load and helps maintain performance as soil conditions and weather change. It is what delivers the pulse animals feel when they encounter the fence.

That consistency is what builds and maintains respect for the electric fence itself. Without it, even an energizer with impressive numbers on a spec sheet can fall short in the pasture.

Why Real-World Conditions Change Everything

Electric fencing rarely operates under ideal conditions. Fence lines cover distance. Vegetation creates load. Soil moisture affects grounding. Weather changes resistance. Add in splices, connections and overall fence pressure, and the system is challenged every step of the way.

So, while stored joules may look strong on paper, the real question is whether that energy can perform under adverse conditions and still carry power all the way down the line.

What Happens When Power Does Not Deliver

When output drops, fence performance drops with it.

A fence that tests strong near the energizer but weak at the far end creates inconsistency, and livestock learn that quickly. When pulses feel uneven or weak, animals are more likely to test the fence. Over time, that can lead to more breakouts, more time spent checking fence and more labor pulled away from other important work.

At that point, it is no longer just a fencing problem. It has become an operational problem, because a fence only works if animals respect it everywhere.

(Datamars)

What to Look for When Comparing Energizers

When evaluating energizers, it is important to look beyond stored joules alone and consider how the unit performs under load.

The real measure of performance is how well it maintains power across distance, how it handles vegetation pressure and how reliably it performs when conditions are less than ideal.

Those are the factors that determine whether a fence holds strong day after day.

The Bottom Line

Stored joules tell you what an energizer can hold.
Output joules tell you what your fence receives.

And when it comes to controlling livestock, the number that matters most is the one that makes it all the way down the fence line, because the only power that matters is the power at the wire.

Stop the Guesswork: Build a Targeted Parasite Plan

Wed, 01 Apr 2026 15:20:18 GMT

As grass greens up and cattle head back to pasture, many producers are “throwing darts in an open field” when it comes to parasite control, says Tennessee Hereford breeder Ryan Proffitt.

The real-world frustration of deworming programs is knowing if they are working, Proffitt says.

Norbrook Technical Services Veterinarian Megan Bollin explains fecal egg count testing, targeted treatment, concurrent deworming, maintaining refugia and smarter pasture management can turn parasite control guesswork into a targeted plan that protects herd health, preserves dewormer efficacy and ultimately adds pounds to the calf crop.

Both Bollin and Proffitt agree a pragmatic roadmap for modern parasite control is anchored in diagnostics, targeted treatment and strong relationships with veterinarians.

Bollin shares five practical strategies to get the most out of today’s dewormers and preserve them for tomorrow:

1. Sit Down with Your Vet.

She encourages producers to map out a herd‑specific internal and external parasite plan with diagnostics built in.

“Your local vet should be your key partner in designing a program that fits your parasites, climate and management style,” Bollin says.

2. Use the Right Product at the Right Time.

Use the correct class, correct dose and consider concurrent deworming when resistance is a known issue. Your local veterinarian can guide you on proper treatment timing to avoid wasting money.

3. Manage Pastures with Parasites in Mind.

Bollin says pasture management is as important as treatment. Pasture type, quality, topography and drainage should all be considered in your plan, knowing we can’t always do much to change them.

“Only about 10% of the parasite life cycle is in the animal; 90% is on pasture,” she says.

Larvae generally stay below 4” on the grass blade. She says it is important to avoid overgrazing pastures below this height and manage stocking density accordingly.

“When you get a big rain after a drought, the larvae that had been waiting in the manure pats can quickly become infective and significantly increase the risk of infection, especially in young calves,” she says.

4. Prioritize High-Risk Animals.

Calves, stockers, bulls and replacements should be prioritized with the strictest parasite control and monitoring programs.

“Calves, replacement heifers and bulls are typically heavier shedders and more susceptible to the effects of parasites than mature cows,” Bollin explains.

Proffitt notes that many producers historically concentrate on keeping mature cows dewormed while underestimating calves’ role as carriers.

“We don’t need to, and shouldn’t be, treating every animal like we always have,” Bollin adds. “That has gotten us in a pickle with resistance.”

5. Measure and Adjust Treatment.

Bollin says it is important to know where you started. Get a baseline fecal egg count, understand your resistance patterns and monitor the efficacy of your treatment program. So many variables change from year to year: climate, weather conditions, new animals and other stressors. It’s critical to routinely evaluate your deworming program and avoid blindly doing the same thing year after year.

(Proffitt Family)

Diagnostics Are Essential, Not Optional

Fecal egg count reduction tests (FECRTs) are the most practical method we have to determine if dewormers are still working and at what level.

Bollin explains the process includes:

Collecting rectal fecal samples and recording identification.
Treating animals with product or products of choice.
Resampling the same animals by taking rectal fecal samples, 10 to 17 days later, depending on the drug or drugs used.

The lab will count how many eggs per gram are in that fecal sample. There will be a pretreatment and a posttreatment sample. Bollin says the goal should be greater than 95% reduction.

Proffitt argues FECRTs are worth the hassle.

“If we don’t have a game plan on what we’re doing and we’re just rushing,” he says. “What did we win at the end of the day if we don’t know what we’re doing?”

Proffitt says testing tells him which cows he can skip treating, which saves him money.

Bollin explains in many cases mature cows 3 years and older, shedding low levels of eggs, on a good plane of nutrition, with no other stressors or health concerns (including liver flukes), should not need to be dewormed.

“This supports ‘refugia’ — intentionally leaving low-risk animals untreated to slow resistance,” she explains. “Because they’re mature, they’ve got a competent immune system that can actually fight off these parasites by themselves without a dewormer.”

To reduce costs further, Bollin says producers can pool fecal samples from multiple cows into a single submission.

(Deb Gustafson)

Beating Parasite Resistance Starts at the Chute

Bollin says dewormer resistance, long documented in sheep and goats, is being seen more frequently in U.S. cattle herds.

She says overuse, underdosing and treating every animal regardless of need are major drivers in resistance.

“All of these deworming products, when they were originally approved, had very high levels of efficacy. We’re talking 99% and above,” Bollin explains. “As we’ve continually used these products, efficacy has been challenged because resistance has increased.”

If you’re using products that are no longer effective in your herd, you’re spending money on drugs that don’t work, and you’re not getting the production benefits. One way to restore efficacy when resistance is present is to use concurrent deworming.

Why Concurrent Deworming Matters

Bollin says concurrent deworming is using two dewormers from different classes at the same time. She stresses producers need to work with a veterinarian to avoid unknowingly pairing two products from the same class, which doesn’t provide the intended benefit.

She explains the benefits of concurrent deworming are:

· Higher overall efficacy when two partially effective products are combined. “Say you’ve got two products, for example, each with 70% efficacy. By using them together, you can raise your overall efficacy to levels exceeding 90%,” she says.

· Broader spectrum of parasite coverage.

· Models would suggest a slowing of resistance.

· Only sustainable long-term when used in conjunction with a refugia program. This means we don’t treat every animal. We want to keep a few “good” worms around that are still susceptible to the drug.

Bollin gives the example of pairing a benzimidazole, or a “white dewormer,” such as fenbendazole, albendazole or oxfendazole, with a macrocyclic lactone such as ivermectin, moxidectin or eprinomectin.

She emphasizes the industry unfortunately doesn’t have a lot of studies looking at this, but a study published in 2025 highlighted the benefits of concurrent treatment with fenbendazole in situations where resistance to macrocyclic lactones is likely.

Dung Beetles Are Valuable Allies

Dung beetles break up manure pats, exposing eggs and larvae to sunshine and dry conditions. Some dewormers are more compatible with dung beetle health.

“Two of the dewormers that are not harmful are moxidectin and fenbendazole,” Bollin says. “Those are two molecules that are generally safe for dung beetles, and those could be a good option to pair together.”

Facility where researchers collect blood samples and weigh cattle before and after they are transported. Steers have painted numbers on their backs so their activity can be followed on camera.

(Stephanie Hansen)

Application Technique and Dosing Accuracy Matter

Bollin says accurate body weights, not visual estimates, are critical, explaining underdosing is a key driver of resistance.

“One of the biggest contributors to resistance is that we are just not giving them enough active ingredient,” she says. “If you don’t have scales, it is best to treat to the heaviest body weight in the group, so that you make sure that they’re all getting enough.”

She also stresses the importance of storing deworming products correctly.

“Leaving them by the chute in temperature swings can reduce efficacy,” she says.

Proffitt also reminds producers to read labels and understand rain windows with pour-ons and to avoid mud or manure on hides. Bollin notes that injectables can provide more certainty that the animal is getting the full dose, whereas oral drenches can be spit out and pour-ons can run off or be groomed off by penmates.

Both Bollin and Proffitt frame parasite control not as one more chore on an overloaded to-do list but rather as a strategic, data-driven opportunity to protect animal health, slow resistance and convert good management into pounds sold.

Your Next Read:

Determine Parasite Load and Follow With Treatment

10 Toxic Pasture Weeds: How To Identify and Manage

Fri, 18 Jul 2025 15:11:28 GMT

Not all toxic plants are equally dangerous, and many factors, such as stage of growth, part of the plant consumed and quantity, play a role in whether animals are affected.

With the ongoing weather variability the past few years, pasture conditions have been highly inconsistent. Some are thriving, while others are struggling due to overgrazing, flooding or drought.

“When pastures thin out, they leave space for opportunistic weeds to move in,” Shelby Gruss, Iowa State University Extension forage specialist, says. “While all weeds can compete for light, nutrients and moisture, some pose a greater threat due to toxicity risks for livestock.”

Below is a list of some of the most common toxic pasture weeds in Iowa and the Midwest, with tips on identification:

Poison Hemlock

(Kevin Bradley)

Poison Hemlock (Conium maculatum)
Toxic Part: Entire plant, especially leaves and stems
Risk: Highly toxic to all livestock (and humans); small amounts can be fatal
ID Tips: Finely divided, fern-like leaves; purple-spotted stems; umbrella-shaped white flower clusters
Notes: Often found in ditches and low-lying areas; do not mow when flowering — can release toxins and spread seeds
Common look-a-like: Queen’s Anne Lace/wild carrot

Wild Parsnip (Pastinaca sativa L)

(John Cardina, The Ohio State University, IPM Images)

Wild Parsnip (Pastinaca sativa)
Toxic Part: Sap causes skin irritation when exposed to sunlight (phytophotodermatitis)
Risk: Mainly a risk to humans (and pets) through skin contact; generally avoided by livestock, but ingestion can cause photosensitivity and severe sunburn
ID Tips: Yellow umbrella-shaped flowers; hairy and grooved stems; leaves look like celery or parsley
Notes: Wear gloves and long sleeves when handling; mowing before seed set helps control
Common look-a-like: Queen’s Anne Lace/wild carrot

Common St. Johnswort (Hypericum perforatum L.)

(L.L. Berry, IPM Images)

St. Johnswort (Hypericum perforatum)
Toxic Part: Entire plant
Risk: Contains hypericin, which causes photosensitivity (sunburn-like skin damage) in light-skinned livestock such as sheep, cattle, goats and horses; severe cases can lead to skin sloughing, blindness or death
ID Tips: Upright perennial with small flowers; the flowers have five bright yellow petals that often have black dots on the petal margins; leaves are opposite, oval and have translucent spots when held up to light; woody base; grows 1' to 3' tall in clumps
Notes: Becomes more problematic in overgrazed or low-fertility areas. Most toxic when flowering. Often avoided unless forage is limited

Common Milkweed

(Kevin Bradley)

Common Milkweed (Asclepias syriaca)
Toxic Part: Leaves and stems
Risk: Contains cardiac glycosides; toxic in large amounts, especially to cattle and sheep
ID Tips: Thick oblong, opposite arranged leaves; milky sap; large round pink flower clusters; stems covered with dense pubescence
Notes: Generally unpalatable unless forage is scarce; monitor pasture for adequate forage growth

Johnsongrass

(Kevin Bradley)

Black Cherry (Prunus serotina) / Johnsongrass (Sorghum halepense)
Toxic Part: Wilted leaves (Black Cherry); young regrowth and frost-damaged tissue (Johnsongrass)
Risk: Both produce cyanide (prussic acid), which can be fatal within minutes
ID Tips (Cherry): Tree with shiny leaves, dark bark, and white flowers
ID Tips (Johnsongrass): Tall grass with prominent midrib, purple panicle seeds, spreads rhizomes
Notes: Do not allow livestock access to wilted branches or frosted regrowth; delay grazing after frost or drought
Common look-a-like (Johnsongrass): Sorghum species

White Snakeroot (Ageratina Altissima)

(Ansel Oommen, IPM Images)

White Snakeroot (Ageratina altissima)
Toxic Part: Entire plant
Risk: Causes “milk sickness” in humans through milk from affected cattle; toxic to cattle, goats, horses
ID Tips: Opposite triangular leaves with serrated edges (sharply toothed) with three main veins; white flowers in flat-topped clusters
Notes: Common in wooded pastures or shaded edges; control early; avoid grazing densely infested areas
Common Look-a-like species: bonesets, other snakeroots

Horsenettle (Solanum Carolinense)

(Kevin Bradley)

Horsenettle (Solanum carolinense)
Toxic Part: Berries and leaves
Risk: Contains solanine; can affect the nervous system and digestive tract
ID Tips: Spiny stems and leaves; small, star-shaped purple flowers; yellow berries when ripe
Notes: Toxic when consumed in large amounts; spot spray or dig out to reduce spread; berries are particularly toxic

Cocklebur

(Kevin Bradley)

Cocklebur (Xanthium strumarium)
Toxic Part: Seeds and seedlings
Risk: Toxic to pigs, sheep and cattle; seedlings are especially dangerous
ID Tips: Rough stems with darks pots; sandpaper-like, triangular leaves with serrated leaf edges; hooked burs that cling to fur and clothing
Notes: Can cause liver damage; avoid overgrazing, as seedlings are more likely to be eaten when forage is limited

Pigweed (Genus Amaranthus L)

(Howard F. Schwartz, Colorado State University, IPM Images)

Nitrate Accumulators
Some plants can accumulate toxic levels of nitrates, especially after drought or heavy fertilization:
Common culprits: Pigweed, lambs quarters, Johnsongrass, and thistles
Risk: Nitrate poisoning reduces oxygen transport in blood — can be fatal
Management Tip: Have suspect forages tested before grazing or feeding; elevated risks following fertilization, and following drought breaking rains

Field Horsetail (Equisetum Arvense L)

(John Cardina, The Ohio State University, IPM Images)

Horsetail (Equisetum spp.)
Toxic Part: Entire plant
Risk: Contains thiaminase; can cause neurological symptoms, especially in horses
ID Tips: Hollow, jointed stems; no true leaves; resembles a bottle brush
Notes: Grows in poorly drained soils and along ditches; improve drainage and limit access

“The first step to weed management is identifying the species you have in your field,” Gruss says.

If you’re unsure about a plant in your pasture, contact your local field specialist.

“When in doubt, better safe than sorry — keep animals away until you’ve confirmed safety,” she summarizes. “Typically, animals will avoid toxic species when there is something else to graze, but eliminating the toxic weed species is ideal. If using herbicides, please read and follow all herbicide directions and grazing restrictions.”

More information on common pasture weeds can be found here: Recognizing and managing common pasture weeds .

More information can be found here: 2025 Herbicide Guide: Iowa Corn and Soybean Production for herbicides labeled for grass pasture, hayfield (table 6) and alfalfa and legumes (table 7).

Cut Feed Costs by Improving Pastures: Weed Control and Soil Fertility Strategies for Ranchers

Thu, 09 Apr 2026 12:00:43 GMT

Feed, it’s one of the biggest, if not the biggest, expense for many ranches. So what can ranchers do to reduce feed costs and still meet nutritional requirements of animals?

“The cheapest way to feed cattle is through grazing standing forage,” says Sam Ingram, field scientist for Corteva Range and Pasture. More specifically, ranchers should prioritize the forage resources they already have access to.

Ingram explains, “If we prioritize those forages… we can produce more pounds of beef on that given acre.”

In addition to practicing rotational grazing, implementing weed control and fertilization practices are key components of prioritizing forages.

Weed Control

A few weeds may seem harmless at first, but they have a significant economic impact when the difference in pounds of forage is measured after removal.

“If we remove weeds, we see an increase in forage production,” shares Ingram. “A rule of thumb is remove a pound of weeds and you can get a pound or more of grass.”

Two weed control options are mechanical and chemical. Mechanical options include tillage, hand pulling or clipping weeds, which can be time consuming and labor intensive.

Chemical options involve the use of herbicides to control weeds. A challenge with chemical control is finding a herbicide that controls weeds without harming other beneficial forages such as grasses and legumes.

“In the past, we’ve had producers tell us they won’t spray because they don’t want to sacrifice their clovers and annual lespedeza,” Ingram shares. “Fortunately, producers who had this reservation about herbicide application don’t have to have it now.”

The herbicide NovaGraz is a broadleaf weed control option that doesn’t kill off beneficial legumes such as white clover and annual lespedeza.
Ingram exlains, “It’s a really revolutionary herbicide that we haven’t had on the market to date.”

For those prioritizing hay forages, the nonresidual feature of NovaGraz is also favorable.

“The nice part of a non-residual herbicide … is that it gives producers flexibility,” Ingram says. “They can make a broadleaf application and still have the option to rotate that acre into another crop.”

It gives both the hay producer and buyer confidence.

Soil Fertility

Ingram says creating a plan to focus on fertility starts with soil testing.

“If you don’t have that test to show you what your nutrient levels are, you’re just guessing,” Ingram says. “Pick a time of the year to test and stick with that time because seasonally our nutrient levels can change.”

Next, producers should put those results to use.

“After you get the results, what are you going to do with them,” asks Ingram. “If it makes sense to add fertility, then let’s do that.”

One caveat of adding fertility is that you are not only providing nutrients for those forages and beneficial legumes, but also weeds. Weeds and grasses are in competition for the same nutrients to thrive.

“Some producers have to choose — am I going to do fertilizer this year or weed control,” Ingram says. “Now with UltiGraz, you have one pass with both fertility and weed control.”

UltiGraz combines both weed control and fertility, and it can be done in one pass to save time and input costs.

He says, “We’re controlling the weeds we don’t want, and the fertility is right there for the forages to take off.”

These are two solutions to maximizing forage production, regardless of the methods you use, remember the bigger picture.

Ingram says, “If we can improve forages through grazing management, weed control and fertility, that’s going to benefit producers.”

Listen to the full conversation on the Casual Cattle Conversations podcast. Learn more about weed control at RangeAndPasture.com/CattleConversation s.