Chicken Respiratory Disease and Welfare

Respiratory diseases including Newcastle disease, infectious bronchitis, and mycoplasma are major welfare and production concerns in poultry. Prevention and prompt treatment protect both birds and flock health.

Key Facts

Respiratory disease is among the leading causes of morbidity and mortality in commercial poultry flocks.
Ammonia from poor litter quality directly damages respiratory epithelia, predisposing birds to infection.
Newcastle disease is a highly contagious viral respiratory illness with significant bird welfare and trade implications.
Infectious bronchitis causes coughing, nasal discharge, reduced feed intake, and egg production losses.
Vaccination programs are central to managing respiratory disease in commercial poultry.
Overcrowding and poor ventilation are the primary management risk factors for respiratory disease outbreaks.

Welfare Considerations

Respiratory disease causes suffering through labored breathing, reduced food intake, lethargy, and in severe cases systemic illness and death. The welfare burden in large commercial flocks can affect thousands of birds simultaneously. Prevention is the most effective welfare intervention: good ventilation, appropriate litter management, lower stocking densities, and comprehensive vaccination programs substantially reduce disease incidence. Prompt detection and treatment of sick flocks, including appropriate depopulation decisions when welfare compromise is severe and untreatable, are also important components of responsible flock management.

What You Can Do

Advocate for mandatory ventilation standards and ammonia limits in commercial poultry housing.
Support welfare auditing systems that include respiratory health assessment.
Choose poultry from producers with lower stocking densities and good biosecurity records.
Encourage research into poultry vaccines and management strategies that reduce disease burden.
Ask food companies about their poultry supplier health and welfare monitoring programs.