Farmed Chicken: Respiratory Health in Conventional Housing

Respiratory disease in conventional poultry housing causes widespread suffering linked to high ammonia levels, dust accumulation, and inadequate ventilation in intensive systems.

Key Facts

Ammonia from litter decomposition causes respiratory tract damage at concentrations above 20 ppm
UK welfare codes specify maximum ammonia concentrations but enforcement and monitoring are inconsistent
Respiratory disease including air sacculitis is a significant cause of morbidity in broiler flocks
High dust levels in conventional houses compromise respiratory health alongside ammonia
Ventilation system design and management critically determine air quality and respiratory welfare
Lower stocking densities dramatically improve air quality and respiratory health outcomes

Welfare Considerations

Respiratory disease in poultry houses is an environmental welfare problem caused by management choices about stocking density, litter management, and ventilation. Chickens in high-ammonia environments experience chronic respiratory irritation and eye damage - the ammonia concentration that causes visible eye damage is regularly exceeded in poorly managed houses. The cumulative welfare cost across billions of chickens globally is enormous. Solutions are available - better ventilation, lower density, and improved litter management - but require investment that the industry resists without regulatory pressure. Consumer demand for higher welfare products drives the market incentive for improvement.

What You Can Do

Choose chicken from certified higher welfare schemes with mandatory ventilation and stocking standards
Support regulatory requirements for independent air quality monitoring in poultry housing
Advocate for lower stocking density requirements in poultry welfare legislation
Reduce conventional poultry consumption to lower demand for high-density intensive housing
Support research into improved poultry house ventilation design for welfare outcomes