Bovine respiratory disease is the most economically significant and welfare-impactful disease in beef cattle, strongly linked to housing conditions, stress, and mixing of animals from different sources.
Bovine respiratory disease causes significant acute welfare suffering through fever, labored breathing, and depression. Animals that develop pneumonia experience significant pain and distress over days to weeks, with some progressing to chronic disease with permanent lung damage. The welfare impact is substantially preventable through improved housing design providing adequate ventilation, reduction in unnecessary animal mixing, and stress reduction during transport and grouping. Metaphylactic antibiotic treatment of entire groups during high-risk periods has welfare benefits but contributes to antimicrobial resistance.