ISSUE FOCUS 38 FEED & ADDITIVE MAGAZINE November 2025 The health of young calves has a significant impact on their entire lifespan, affecting growth rates, reproductive efficiency and even future milk production. In fact, calves are more susceptible to mortality during the first three weeks of life than during the rest of their rearing period, which makes this period extremely economically important. Numerous factors, including animal, environmental and management practices, contribute to calf health and disease (Figure 1). THE CRITICAL FIRST WEEKS Neonatal disease, especially diarrhea, has a significant impact on growth during the rearing period, long-term future performance and loss of genetic potential for future herd improvement. To effectively control calf diarrhea, a proactive approach is essential. Implementing strong biosecurity measures, including cow vaccination programs and maintaining a clean environment, is critical. Providing newborn calves with an adequate amount of high-quality colostrum in a timely manner is another cornerstone of calf health. By focusing on these preventive strategies, farmers can build calf immunity and reduce disease incidence. However, despite significant advances in the understanding of neonatal diarrhea, it remains one of the leading causes of death in calves. “It is critical for every farm to have an effective strategy to prevent and treat calf diarrhea, as quick action should be taken when diarrhea occurs. The priority is to minimize the calf’s fluid loss to prevent dehydration and reduce the risk of metabolic acidosis. Stabilizing the intestinal microbiota and promoting the regeneration of intestinal villi are additional key points to address in cases of calf diarrhea.” COMBATTING CALF DIARRHEA: A Cornerstone of Dairy Success Dr. Melinda Culver Veterinarian Biochem Miriam Deppe Product Manager Ruminants – Dietary Feed Supplements Biochem
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