Bovine respiratory disease is the most costly disease in beef cattle, causing significant welfare harm; effective prevention through vaccination, ventilation, and stress reduction is available.
Bovine respiratory disease causes acute welfare harm through fever, respiratory distress, and the systemic effects of severe infection. Calves arriving at feedlots after transport are immunocompromised by stress and simultaneously exposed to pathogens from multiple sources; the result is high disease incidence in the critical first weeks. The welfare trade-off of metaphylactic treatment — treating groups before clinical signs appear — prevents more severe suffering at the cost of antibiotic exposure in animals that might not have become ill. Prevention through stress reduction, vaccination, and good ventilation addresses causes rather than managing consequences and represents the highest-welfare approach.