Bovine Respiratory Disease: Deep Welfare Management Guide

Bovine respiratory disease (BRD) is the single most significant welfare and production challenge in beef and dairy cattle production worldwide.

Key Facts

• BRD affects approximately 15-45% of feedlot calves and causes significant suffering and mortality
• The disease involves multiple pathogens including viruses (IBR, BRSV, PI3, BCoV) and bacteria
• Stress from weaning, transport, mixing, and weather change are primary welfare predisposing factors
• Metaphylaxis (treating all high-risk cattle on arrival) reduces welfare impact in feedlot systems
• Early detection using clinical scoring (DART, FBAR) dramatically improves treatment outcomes

Welfare Considerations

BRD causes significant acute welfare suffering — fever, respiratory distress, depression, and reduced appetite in affected cattle. Chronic or recurrent BRD leads to permanent lung damage (chronic pneumonia, lung abscesses) that affects long-term welfare and productivity. The peak welfare risk occurs in the first 28 days after weaning or transport when multiple stressors coincide with pathogen exposure. Welfare-focused BRD management requires structured risk assessment to identify high-risk cattle, early clinical detection using validated scoring systems (a respiratory rate over 48 breaths per minute is a key indicator), prompt antibiotic treatment for confirmed clinical cases, and metaphylaxis for very high-risk cattle arriving from multiple-source auctions.

What You Can Do

• Use a validated clinical scoring system (DART) to detect BRD early in high-risk cattle
• Implement structured arrival protocols for feedlot and dairy replacement cattle including BRD risk assessment
• Train farm staff to recognize early BRD signs: nasal discharge, elevated respiratory rate, depression
• Reduce stress at weaning through fence-line weaning methods where practical
• Vaccinate against the key BRD viral pathogens before high-risk periods including weaning and transport