Bovine respiratory disease is the most economically costly and welfare-significant disease in UK beef cattle, with prevention through management and vaccination offering significant welfare improvement.
Bovine respiratory disease welfare is acute and significant: affected calves experience fever, breathing difficulty from inflamed airways, and pain from the systemic inflammation of respiratory infection. The welfare burden is compounded by the challenge of early identification - calves in the initial stages of BRD may show only subtle signs that an attentive stockperson familiar with individual animals can detect but that casual observation misses. The welfare and economic consequences of delayed treatment are severe: BRD that progresses to pneumonia causes prolonged illness, reduced growth, and increased mortality. Early treatment with appropriate antibiotics when clinical signs first appear is highly effective, demonstrating that the welfare harm of established BRD is largely preventable given adequate monitoring and rapid response. Prevention through vaccination of calves against the viral and bacterial pathogens that predispose to BRD, combined with management to reduce mixing stress and ensure adequate ventilation, reduces disease incidence substantially. Precision livestock farming technologies including continuous temperature monitoring can detect fever early enough to allow pre-symptomatic treatment, potentially eliminating much of the welfare harm of established respiratory disease.