As pastures green up and calves hit the ground, the real work of the breeding season quietly begins. It’s a short window with long-lasting consequences. From post‑calving cows trying to regain body condition to replacement heifers who must stick the first time to bulls whose soundness and stamina drive the whole program, every decision you make now echoes through future calf crops.
As breeding begins, industry experts share these three keys to help ensure you don’t just turn out cattle — you turn out results:
1. Cows: Manage the Post-Calving BCS Slump
Shelby Roberts, Alltech beef technical support, encourages producers to manage energy, protein and water so cows, especially first‑calf heifers, maintain a body condition score (BCS) of 5 to 6.
She says it is important cows don’t lose more than one score post‑calving. Thin, losing cows come into heat late and breed late.
Read more about why energy, protein, minerals and weekly body condition checks are critical to getting cows and first‑calf heifers rebred on schedule:
From Calving to Conception: Nutrition Strategies to Keep Cows on Track
2. Heifers: Get Replacements Ready to Stick
Dan Tracy, Zoetis beef technical services, says heifer selection drives the herd. He suggests producers select heifers by birth date and quality, then grow them to 65% to 70% of mature weight and BCS 5 to 6 by breeding.
“The most single important thing is their birthday,” he says. “The older heifers are going to set the tone. They’re going to stay in the herd longer. They’re going to calve earlier.”
He says it is important to be hard on heifers — set minimums.
“We’re going to spend a lot of money getting them bred, so we want to get that payback,” he adds. “Use reproductive tract scoring and pelvic measurements 45 to 60 days ahead of breeding to cull the ones that won’t keep up.”
Read more about the importance of heifer development:
Building for the Long Haul: The Hermes Strategy for Premium Bred Heifers
From Selection to Breeding: A Veterinarian’s Guide to Productive Heifers
3. Bull Power: Soundness, Condition and Semen Production Cycles
It is important to manage bulls as seriously as cows. Take the time to evaluate bulls and make sure they are ready to go to work.
Saulo Zoca, University of Tennessee assistant professor and beef cattle reproduction specialist, says a breeding soundness exam (BSE) is like a car insurance policy for a bull. He suggests testing bulls 30 to 60 days before the breeding season to allow time for management decisions.
Read more about how a bull’s fertility and breeding ability is crucial to a producer’s success:
Along with a BSE, another tool producers should use to make sure bulls are ready to go to work is BCS.
Phillip Lancaster, Kansas State University beef cattle nutritionist, stresses, compared to cows, bulls require more weight change to move between BCS points due to their larger size.
Read more about how environmental and nutritional factors can affect fertility:
Factors That Can Affect Bull Fertility
Synchronization and AI Can Front‑Load Pregnancies
Artificial insemination (AI) and synchronization programs can be a powerful tools when they’re planned, not improvised.
“Synchronization only works if you work the protocol,” says Jennifer Koziol, Texas Tech University associate professor of food animal medicine and surgery. “Put it on a calendar, know who’s doing what on which day, and don’t try to wing it between everything else.”
Oklahoma State University’s Mark Johnson says regardless of when your calving season occurs, manipulating the reproductive process of your cow herd can result in shorter breeding and calving seasons. Accordingly, more calves born earlier in the calving season result in an older, heavier, more uniform calf crop when you wean.
Johnson explains estrus synchronization can be used for natural mating or AI breeding. The labor, not the products, is usually the limiting factor.
“Synchronization protocols permit us to concentrate the labor needed for heat detection to a few days, and in some cases eliminate the need for heat detection when cows can be bred on a timed basis,” he explains.
Read more about synchronization protocols in heifers versus cows and how to find what works best in your operation:
Maximizing Reproductive Success: How to Use Estrus Synchronization to its Full Potential
Trace Minerals: Important for the Whole Herd
A good mineral program can help set a herd up for success. Trace minerals play a critical role in reproduction — supporting fertility, embryo survival and sperm production.
Craig Louder, Axiota Animal Health senior technical consultant, explains, after calving, a cow has roughly 90 days to rebreed in order to stay on a 12‑month calving interval.
“Because that window is so short, we can’t afford delays — mineral deficiencies need to be addressed promptly to support timely conception,” he says. “If we do not have adequate trace minerals. We decrease both the ability to achieve pregnancy and the ability to maintain it. Getting a cow bred has little value if she cannot carry that pregnancy to term and deliver a viable calf.”
Reproduction is one of the first things to suffer when trace mineral status isn’t right. You may not see a sick cow; you just see fewer pregnancies.
“Research has shown that if we don’t have adequate copper, we’re going to be nearly four times more likely to end up with a stillborn calf,” Louder says. “If we don’t have adequate selenium, we can be 31 times more likely to have a stillborn calf.”
As soon as a cow delivers a calf, her trace mineral status drops by 30%. Louder stresses producers have two months to get the trace mineral status built back up.
He says research shows even when on a great organic trace mineral program, feeding a cow 150% of what her requirements are is still going to take close to a month to be able to build it up.
“That’s if your cow is smart enough to go out and read the label and understand that she has to do this and gets all that taken care of,” he adds.
With an injectable, like Multimin 90, producers can bypass a lot of those hurdles an oral supplement takes and rapidly replenish that cow’s trace mineral status.
“It doesn’t replace the oral program,” Louder says. “This is simply a way that we can get it into her at the time we need it for those management practices in a more rapid and efficient manner.”
He suggests producers give a Multimin 90 shot twice per year:
- Precalving — 30 days prior to calving is ideal. However, if management doesn’t allow that, supplementation at any point during the third trimester can still provide meaningful benefit.
- Prebreeding — 30 days prior to breeding is ideal. If using AI, there is benefit when putting it in at the same time as the CIDR.
“We have reset the follicular waves, and the minerals can be utilized by the follicle that will ovulate the egg that will be fertilized,” he explains.
Don’t forget the bulls.
“Sperm production requires a lot of trace minerals,” Louder says. “It’s a 63‑day process. Most breeding soundness exams are done about two months before turnout. We can hit them with a dose of minerals then, and I recommend giving them another dose at turnout.”
The Countdown to Breeding: A 90-Day Management Timeline
Here’s a suggested timeline as producers prepare for breeding season:
- 90 days before breeding:
Evaluate cow and heifer BCS. Adjust rations.
Pull previous conception data. Identify problem groups. - 60 days before:
Schedule BSEs for bulls.
Finalize heifer development targets and mineral program. - 30 days before:
Confirm synchronization protocol and handling dates.
Double‑check facilities, labor and record systems. - Day 0 (AI or bull turnout):
Quick recheck of bull condition and soundness.
Confirm tags and records.
Breeding season will never be completely simple, but it can be far more intentional. The experts agree: protect body condition before you lose it, develop heifers like the high‑dollar investments they are and expect your bulls to work as hard on fertility as you do on everything else. Every pregnant female counts, and success comes from stacking small, disciplined decisions across cows, heifers and bulls.
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