Intensive Poultry and Ammonia Welfare

Ammonia from poultry litter is a major welfare hazard in broiler and laying hen housing, causing respiratory damage, eye disease, and contact dermatitis in affected flocks.

Key Facts

Ammonia concentrations in poorly managed broiler houses can reach 50-100 ppm - far above welfare thresholds
EU welfare regulations set an action threshold of 20 ppm and a maximum of 25 ppm for poultry
Ammonia causes keratoconjunctivitis - painful eye inflammation - at sustained concentrations above 10 ppm
Foot pad dermatitis severity correlates strongly with litter moisture and ammonia exposure
Ventilation management, litter additives, and feed management are primary tools for ammonia control

Welfare Considerations

Ammonia is a pervasive but often invisible welfare hazard in intensive poultry housing. Chronic low-level exposure causes progressive respiratory tract damage, eye disease, and skin burns on contact points including feet, hocks, and breast. Birds with ammonia-related eye disease show impaired vision, reduced feeding, and social withdrawal. The challenge is that ammonia concentrations vary significantly with flock age, stocking density, and weather conditions. Proactive litter management - monitoring moisture, applying amendments, and ensuring effective ventilation - is essential throughout the production cycle. Stockperson training in ammonia recognition and response is a fundamental welfare requirement.

What You Can Do

Support poultry welfare certification requiring maximum ammonia concentration monitoring
Advocate for mandatory ventilation standards and ammonia monitoring equipment in all poultry units
Buy chicken and eggs from producers with independently verified flock health assessments
Support research into litter management and feed formulation strategies minimizing ammonia production
Raise awareness about ammonia as a significant but underrecognized welfare issue in poultry farming