Bovine Respiratory Disease in Calves: Prevention and Welfare

Bovine respiratory disease (BRD) complex is the most costly and welfare-significant disease condition in the beef and dairy calf industry, causing pneumonia, chronic lung damage, and significant mortality.

Key Facts

BRD accounts for over 70% of veterinary costs in beef calves in the USA
Multiple pathogens interact including BRSV, PI3, IBR, and Mannheimia haemolytica
Risk factors include stress at weaning, mixing, transport, and cold damp housing with poor ventilation
Calves that survive severe BRD can develop chronic lung lesions reducing lifetime performance
Vaccination programmes and management at high-risk periods are the primary prevention tools

Welfare Considerations

BRD causes acute suffering from pneumonia, fever, and respiratory distress. Calves with BRD experience difficulty breathing, anorexia, and weakness, with mortality rates reaching 2-5% in severe outbreaks. Survivors with chronic lung lesions face ongoing respiratory compromise and reduced welfare throughout their lives. Housing ventilation is a key modifiable risk factor; draughty, poorly designed housing dramatically increases BRD incidence. Good colostrum management, appropriate vaccination, and early detection and treatment substantially reduce the welfare burden.

What You Can Do

Ensure calves receive adequate quality colostrum within the first six hours of life
Optimise calf housing ventilation to ensure fresh air without draughts
Implement vaccination programmes covering key BRD pathogens in consultation with your vet
Train stockpersons to recognise early signs of respiratory disease for prompt treatment