Bovine respiratory disease is the most costly and common health problem in beef and dairy cattle worldwide. Its welfare implications are severe and often underappreciated in production-focused management systems.
BRD causes acute suffering: fever, laboured breathing, and pleurisy (chest pain) are major components of the clinical syndrome. Cattle are stoic animals that mask illness; by the time visible signs are apparent, significant lung consolidation has often occurred. Sub-clinical BRD — lung damage without obvious visible signs — affects a substantial proportion of feedlot cattle and causes chronic welfare compromise without detection or treatment. Prevention through reduced stress at critical transition points (weaning, transport, arrival) is the most welfare-positive approach. Low-stress handling, adequate rest and water on arrival, and careful commingling management reduce BRD incidence. Investment in animal observation skills that allow early detection of subtle illness signs saves both welfare and economic costs.