High ammonia concentrations in poorly ventilated poultry houses cause respiratory damage, eye problems, and chronic pain in birds, representing a welfare problem that is both common and preventable through management and design.
Ammonia welfare in poultry houses exemplifies how production conditions that are normalised through habituation can cause significant chronic harm that is rarely visible to consumers or regulators. Eye damage from ammonia exposure is progressive and causes pain that birds cannot communicate — yet remains common in commercial houses that technically comply with ventilation regulations written for average rather than peak conditions. Addressing ammonia welfare requires both regulatory enforcement and genuine producer commitment to maintaining ventilation systems and litter quality throughout the flock cycle, not just at the start. The alignment of worker and animal welfare around ammonia reduction creates an opportunity for joint advocacy that frames this as a shared interest rather than a purely animal welfare concern.