Bovine respiratory disease is the most economically significant and welfare-relevant disease in beef and dairy cattle systems. Understanding its causes, prevention, and welfare impact enables better management decisions.
BRD causes significant suffering from the pain of pneumonia, fever, and respiratory distress. Cattle with acute BRD are clearly unwell - depressed, reluctant to move, with laboured breathing and elevated temperature. Subclinical BRD is equally important from a welfare perspective - lung damage from undetected or undertreated infection causes chronic respiratory impairment that reduces quality of life. The predictable nature of BRD outbreaks in certain management contexts (post-weaning, post-transport, mixed-source cattle) means that much of this suffering is preventable through vaccination, stress management, and biosecurity. Early detection through systematic daily monitoring and prompt treatment is essential when disease does occur.