Cattle Calf Pneumonia: Prevention and Early Treatment

Bovine respiratory disease in young calves is a major welfare and economic concern preventable through systematic management of early calf life.

Key Facts

Calf pneumonia is the most common disease of beef and dairy calves, causing significant mortality and suffering
The first few weeks of life are the highest risk period, especially around weaning and housing transitions
Pathogens include BRSV, PI3, Mycoplasma bovis, Pasteurella multocida, and Mannheimia haemolytica
Colostrum quality and volume consumed in the first 6 hours of life is the single most important protective factor
Early treatment within 24 hours of symptom onset dramatically reduces severity and duration of illness
Good calf housing with appropriate ventilation and stocking density significantly reduces pneumonia incidence

Welfare Considerations

Calf pneumonia causes significant acute welfare harm through fever, labored breathing, nasal discharge, and the systemic malaise of bacterial infection and lung inflammation. Calves with pneumonia are visibly depressed, reluctant to feed, and unable to engage in normal activity. Untreated pneumonia causes prolonged suffering and can result in permanent lung damage affecting lifetime respiratory function and productivity. The welfare burden of calf pneumonia is largely preventable through excellent colostrum management, appropriate housing design, and systematic vaccination against key pathogens. Farmer training to recognize early pneumonia signs (increased respiratory rate, nasal discharge, depression) and act within 24 hours transforms welfare outcomes through earlier, more effective treatment.

What You Can Do

Ensure all calves receive adequate colostrum (4 litres for beef calves, 3 for dairy) within 6 hours of birth
Test colostrum quality with a Brix refractometer - readings below 22% require supplementation
Provide well-ventilated, dry, draft-free housing for young calves with adequate space
Train yourself and staff to recognize early pneumonia signs and act within 24 hours
Develop a calf respiratory scoring system to standardize detection and treatment decisions
Vaccinate against key pneumonia pathogens with veterinary guidance on appropriate timing and product