Respiratory Disease Prevention in Beef Feedlots

Bovine respiratory disease (BRD) in feedlots causes significant suffering and mortality. Prevention through proactive management is far more effective for welfare and economics than treatment after disease establishes.

Key Facts

BRD is responsible for approximately 70-80% of feedlot morbidity and 40-50% of feedlot mortality in North American beef production
Calves entering feedlots from multiple sources are at highest risk — pathogen mixing plus stress-induced immune suppression creates an ideal disease environment
Metaphylaxis — treating all high-risk calves with long-acting antibiotics on arrival — is commonly used but raises antimicrobial resistance concerns
Preconditioning programmes — weaning, vaccinating, and adapting calves to feedlot conditions before sale — reduce BRD incidence by 40-60%
Visual health monitoring (pen riders) twice daily identifies early cases, but 20-30% of BRD cases may be missed clinically
Lung damage from severe BRD is often irreversible — cattle with chronic pneumonia have lasting welfare impairment
Ventilation design is critical — feedlot facilities with poor air movement have substantially higher BRD rates

Welfare Considerations

BRD in feedlots causes acute suffering that too often becomes chronic. Calves with pneumonia experience fever, painful inflammation, difficulty breathing, and progressive weakness. Without early detection and treatment, inflammation spreads and lung tissue is permanently destroyed. Cattle with chronic BRD — lung adhesions and fibrosis from poorly treated acute disease — endure lasting respiratory impairment, reduced exercise tolerance, and chronic pain. The feedlot entry period is the highest-risk welfare window: the combination of transport stress, commingling, novel environment, and pathogen exposure creates immune suppression that allows pathogens to take hold. Welfare improvement requires addressing root causes — preconditioning, transport welfare, and facility design — rather than relying solely on metaphylactic antibiotics.

What You Can Do

Support beef producers who invest in preconditioning programmes and document vaccination and health protocols
Choose beef with verified supply chain animal health standards that minimise feedlot BRD incidence
Advocate for industry standards requiring preconditioning as a condition of premium pricing
Reduce beef consumption or choose pasture-raised alternatives that avoid intensive feedlot entry systems
Support research into BRD prevention strategies that reduce reliance on metaphylactic antibiotics
Donate to agricultural extension programmes that help producers implement evidence-based preconditioning systems