A peer-reviewed study published online October 9, 2026, in The Veterinary Journal examines the risk factors tied to three outcome measures that define calf-rearing economics: antimicrobial treatment incidence, average daily weight gain, and mortality in Bavarian weaning operations.

The research team — Lea Staber, Florian M. Trefz, Alexander Stoll, Daniela Klaus-Halla, Yury Zablotski, and Ingrid Lorenz — analyzed data from calf-raising facilities in Bavaria, Germany's largest cattle-producing region. The study links husbandry and management variables to the three outcomes that drive both antibiotic stewardship targets and on-farm profitability.

At the exam table and in the barn, the three endpoints in this study are the numbers practitioners and producers already track. Antimicrobial treatment incidence sits at the center of European Union reduction targets under the EU Farm-to-Fork strategy, which calls for a 50% cut in antimicrobial sales for farm animals by 2030. Average daily weight gain is the standard performance metric in weaning operations. Mortality is the outcome that combines both.

Why Bavaria, and why these three measures?

Bavaria hosts a dense network of calf-rearing and weaning operations, and German federal and state surveillance programs have pushed farms toward benchmarking antibiotic use. Studies of this design give practitioners the evidence base to identify which management factors — rather than which drugs — move the needle on treatment incidence.

For food-animal veterinarians, the practical value of a risk-factor analysis lies in advisory work. Health certificates, herd visits, and treatment protocols increasingly require documented antibiotic-use figures. A study that connects specific operational risk factors to treatment incidence, growth rate, and death loss gives veterinarians concrete levers to discuss with clients.

What does this mean in practice?

Companion-animal practice is unaffected by the findings, but public-health implications run through antimicrobial resistance. Reducing treatment incidence in calf rearing directly supports broader EU antibiotic-reduction goals, which address the reservoir of resistance genes that can transfer to human pathogens through the food chain.

The study adds to a growing body of German-language-region research on calf health. Co-author Ingrid Lorenz, formerly of the Chair for Ruminant Health at Ludwig-Maximilians-Universität München and a longtime researcher at the Bavarian Animal Health Service, has published extensively on neonatal calf diarrhea, dehydration, and colostrum management. Florian M. Trefz's prior work on calf diarrhea and metabolic acidosis is standard reading in bovine neonatology. Their collaboration here suggests the study design follows established epidemiological methods used in earlier Bavarian calf-health surveys.

What comes next?

With publication online October 9, 2026, the full methodology, sample size, herd-level variables, and quantitative risk estimates are available to practitioners who want to translate the findings into farm-specific protocols. As EU antimicrobial-reduction deadlines approach in 2030, studies like this one give cattle practitioners the data to show which management changes pay off in fewer treatments, faster gains, and lower mortality.