Farm Animal Welfare

Chicken Ammonia Levels and Respiratory Welfare

Elevated ammonia in poultry houses causes respiratory damage, eye problems and welfare impairment in billions of birds.

Key Facts

Ammonia from litter decomposition causes respiratory inflammation at concentrations above 20 ppm
UK Welfare of Farmed Animals Regulations set a maximum of 20 ppm for poultry
High stocking density and poor ventilation are primary causes of ammonia accumulation
Environmental control including litter management and ventilation reduces ammonia substantially
Birds in high ammonia environments show avoidance behaviour and corneal damage

Welfare Considerations

Ammonia is an invisible but significant welfare hazard affecting enormous numbers of broilers and laying hens. Welfare-conscious litter management and ventilation design that maintains ammonia below harmful thresholds is a fundamental welfare requirement.

What You Can Do

Advocate for ammonia monitoring requirements in poultry welfare certification schemes
Support investment in poultry house ventilation and litter management research
Ask poultry producers about their ammonia monitoring protocols and maximum levels