High milk production at dry-off may lead to more mastitis at calving, according to Ohio State University research.

In the study, the odds of a cow calving with an environmental mastitis infection increased by at least 77 percent for every 11-pound increase in daily milk yield above 27.5 pounds at dry-off. This was true even for cows given an antibiotic dry-cow treatment, the researchers said in the February Journal of Dairy Science.