Farm Chicken Respiratory Disease Welfare

Respiratory disease is a major source of suffering in commercial poultry, affecting millions of birds in poorly ventilated or overcrowded housing. Prevention and early detection are key welfare priorities.

Key Facts

Infectious bronchitis, Newcastle disease, and mycoplasma are among the most common poultry respiratory pathogens
Ammonia from litter irritates respiratory tracts and predisposes birds to secondary infections
Poor ventilation in cold months, when farmers reduce airflow to maintain temperature, increases disease risk
Respiratory disease causes coughing, labored breathing, reduced feed intake, and significant mortality
Biosecurity measures including all-in all-out stocking and strict hygiene reduce pathogen introduction
Vaccination programs have dramatically reduced mortality from Newcastle disease and infectious bronchitis
Rapid diagnostic testing allows earlier intervention before disease spreads through flocks

Welfare Considerations

Respiratory disease in poultry represents a chronic welfare problem linked to the environmental conditions of intensive production. Ammonia accumulation from litter degrades the respiratory mucosa, creating entry points for pathogens. Overcrowding facilitates pathogen transmission between birds. Cold weather ventilation reduction to maintain temperature creates the ammonia and moisture conditions that promote disease. These are not inevitable features of poultry production but consequences of management choices that prioritize throughput over environmental quality. Reducing ammonia through litter management, maintaining appropriate ventilation year-round, and implementing robust biosecurity can substantially reduce respiratory disease burden and the associated suffering across commercial flocks.

What You Can Do

Support poultry welfare standards that include ventilation and air quality requirements
Advocate for mandatory ammonia monitoring in commercial poultry housing
Choose poultry products from farms with documented respiratory health management programs
Support research into respiratory disease prevention strategies for commercial poultry
Engage with producers and retailers about their biosecurity and flock health management standards