Cattle Pneumonia in Calves and Welfare Management

Bovine respiratory disease is the most costly disease affecting beef and dairy calves, causing significant pain, reduced growth, and long-term lung damage. Prompt detection and treatment, combined with preventive management, protect both welfare and productivity.

Key Facts

Bovine respiratory disease accounts for more than 70 per cent of all calf morbidity and 40 per cent of mortality in feedlots
Pathogens include Mannheimia haemolytica, Pasteurella multocida, bovine coronavirus, and bovine respiratory syncytial virus
Clinical signs — nasal discharge, coughing, elevated respiratory rate, and depression — often appear 24 to 48 hours after infection
Calves with undetected subclinical pneumonia at turnout have significantly lower lifetime performance
Early antibiotic treatment combined with anti-inflammatory therapy reduces lung consolidation and improves welfare outcomes

Welfare Considerations

Pneumonia causes pleuritic pain, dyspnoea, and fever — a prolonged period of suffering if not detected and treated within 24 to 48 hours of symptom onset. Affected calves adopt a hunched posture, cease normal play behaviour, and reduce feed and water intake rapidly. Welfare-centred calf rearing implements twice-daily visual health scoring, individual calf health records, pre-movement vaccination protocols, adequate ventilation without draughts, and transition milk management to optimise passive immunity. Antibiotic stewardship requires accurate diagnosis before treatment and appropriate withdrawal period tracking.

What You Can Do

Implement a twice-daily health scoring protocol using a validated system such as the Wisconsin Calf Health Scoring Chart
Ensure all calves receive sufficient high-quality colostrum within six hours of birth to maximise passive immunity
Vaccinate calves against key respiratory pathogens as directed by your herd health vet
Improve calf housing ventilation — target 50 air changes per hour without creating draughts at calf level
Work with your vet to establish clear treatment trigger thresholds and antibiotic protocols based on accurate diagnosis