Cattle Respiratory Disease: Prevention and Welfare in Feedlots

Bovine respiratory disease (BRD) is the most costly and welfare-significant disease affecting cattle in feedlots. Understanding its causes and prevention enables both better welfare and production outcomes.

Key Facts

BRD is responsible for approximately 70-80% of feedlot cattle morbidity and 40-50% of feedlot mortality
It results from the combined stress of transport, commingling, and new pathogens — the "shipping fever" complex
Key pathogens include Mannheimia haemolytica, Pasteurella multocida, and Histophilus somni
Bovine coronavirus, bovine respiratory syncytial virus, and IBR virus are common viral predisposing factors
Morbidity rates in newly arrived feedlot cattle can reach 15-45% in high-risk groups
Early treatment with appropriate antibiotics reduces mortality from 5-10% to under 1% in responsive cases
Metaphylaxis (mass antibiotic treatment at arrival) is used in high-risk groups but raises antimicrobial resistance concerns
Visual observation for clinical signs — nasal discharge, droopy ears, labored breathing — is the primary detection method

Welfare Considerations

BRD causes significant respiratory distress, fever, and pain before it is detected and treated. The reliance on visual observation means many animals suffer for days before clinical signs are obvious enough to trigger treatment. Chronic BRD leaves permanent lung damage reducing oxygen capacity and exercise tolerance. Transport and commingling — unavoidable elements of feedlot production — create the stress cascade that precipitates BRD, making prevention by system redesign extremely difficult. Improved early detection using accelerometer-based monitoring, automated temperature sensing, and milk production data is reducing time-to-treatment in some operations. Adequate pain management using NSAIDs alongside antibiotics improves recovery and welfare outcomes and is supported by evidence.

What You Can Do

Support adoption of precision livestock technology that detects BRD earlier than visual observation
Advocate for pain management protocols alongside antibiotic treatment in feedlot BRD treatment
Support research into BRD vaccines and management strategies that reduce the need for metaphylaxis
Choose beef products from suppliers with robust BRD prevention and animal health programs
Reduce beef consumption from intensive feedlot systems
Advocate for minimum space and commingling standards that reduce BRD risk at feedlot entry