“Are we better off treating disease early or treating disease precisely?” Veterinarians of Kansas State University posed this question a recent episode of BCI Cattle Chat.
Deciding when to initiate treatment is one of the most consequential judgment calls in cattle health management. The tension between acting early and waiting for diagnostic certainty persists because there is no single correct approach. Each decision carries both biological and management consequences.
“To me, I’m looking at this and framing the question as should I be sensitive or specific in my diagnostic approach,” says Dr. Todd Gunderson, clinical assistant professor in beef production medicine at K-State.
A sensitive approach prioritizes catching disease early, accepting that some animals will receive treatment they might not truly need. A specific approach limits treatment to animals that clearly meet disease thresholds, reducing unnecessary intervention but increasing the risk of missing cases that would have benefited from earlier action. The trade-off is unavoidable.
Gunderson puts forth different clinical scenarios where either approach could be beneficial or detrimental.
“Treating scouring calves and, as a result, creating more scouring calves because I’m contaminating equipment, I’m contaminating my clothes … I’m overly aggressive at going into the calving pen,” he says.
On the other hand, waiting too long could negate any help treatment might offer.
“[If] I wait until the animal is at a pathological state where they have consolidation, they already have fibrinous pleuritis of the chest cavity or adhesion and fibrous attachments,” he says. “That animal has enough pathology that even if I kill every microbe in that animal’s system that’s causing disease, it would still not recover.”
Disease Treatment as a Dynamic Process
Rather than viewing treatment as a one-time, irreversible decision, a more effective framework treats intervention as a dynamic process. Choosing not to treat immediately does not mean choosing inaction; it means committing to close monitoring and reassessment over defined time intervals.
“I don’t get trapped into thinking that I have to make the decisions that I’m going to stick with,” says Dr. Bob Larson, professor in production medicine at K-State. “Let me make a decision today and act on it and then reassess it in 12 hours and reassess it in another 12 hours, and be flexible because I’m not good enough today to predict the next 12, 24, 72 hours and be right all the time.”
Repeated evaluations allow decisions to evolve as new information emerges, improving accuracy over time.
“Just because I acted doesn’t mean that now all my thinking is over,” Larson says. “If I act, I need to maintain vigilance, observations, reassess, be willing to change my mind.”
Make Decisions Based on the Herd
Treatment decisions should also be considered in the context of the group not in isolation. Individual animal signs can be ambiguous, but herd-level trends provide valuable context. During times of disease pressure, subtle changes might warrant treatment, while the same signs in an otherwise healthy group could justify continued observation.
“We sometimes take these decisions and try to make them in a vacuum, and you can’t do that,” says Dr. Brad White, Professor and Production Medicine Director of the Beef Cattle Institute at K-State. “Often, that individual animal is a part of a group. My expectations for that group today should impact my decision.”
This includes the recent health of the herd and the number of animals presenting as ill.
In addition, environmental and situational factors should further shape treatment thresholds. Weather conditions and recent stressors both impact disease risk and recovery potential. Incorporating these variables into treatment decisions expands diagnostic accuracy beyond the animal itself.
