Intensive Farming

Intensive Pig Unit Air Quality Welfare

Air quality in intensive pig units directly affects respiratory welfare, with ammonia, dust, and endotoxins being primary concerns.

Key Facts

Ammonia above 20 ppm causes respiratory irritation in pigs
Endotoxins from bacterial decomposition of feces cause inflammation
Particulate matter in poorly ventilated pig houses causes lung damage
Ventilation management and litter quality control are the primary interventions

Welfare Considerations

Pigs in poorly ventilated units with high ammonia, dust, and endotoxin levels experience chronic respiratory irritation, inflammation, and immune activation. This is not acute suffering but chronic welfare compromise that accumulates over the production period. Ventilation management, litter quality control, and appropriate stocking density maintain air quality within welfare thresholds.

What You Can Do

Support pork from operations with documented ventilation standards
Advocate for air quality limits in pig welfare regulations
Buy from producers with transparent health outcome data
Back research into air quality management in pig housing