Poultry Litter Quality and Respiratory Welfare

The quality of litter in broiler chicken houses profoundly affects respiratory and foot health. Managing ammonia, moisture and bacterial contamination is central to addressing chronic welfare problems.

Key Facts

Ammonia from bacterial breakdown of litter urate can exceed 25 ppm in poorly managed houses
Ammonia causes inflammation of the respiratory tract, conjunctivitis and reduced air exchange capacity
Hock burns and foot pad dermatitis affect up to 80% of broilers in high-stocking-density systems
Foot pad dermatitis scoring at slaughter is used as a welfare indicator in some EU countries
Litter management including turning, removal of wet patches and crust breaking reduces ammonia levels
Stocking density is the single most important determinant of litter quality in broiler houses
Ventilation systems maintaining minimum 0.2 m per second air movement significantly reduce ammonia accumulation
Litter quality monitoring programs in Denmark and UK have reduced foot pad dermatitis prevalence

Welfare Considerations

Chronic respiratory irritation from ammonia exposure causes prolonged suffering in broiler chickens that spend their entire lives in the same house. At concentrations above 20 ppm, ammonia causes measurable airway inflammation and avoidance behavior in chickens given the choice. Foot pad dermatitis causes progressive ulceration of the footpad skin, causing pain with every step - a condition that worsens as birds become heavier and spend more time resting. The fact that broilers have been selected to develop so rapidly that many prefer to minimize walking creates a vicious cycle where reduced movement worsens litter contact. The widespread prevalence of these conditions - documented through routine abattoir monitoring - indicates that litter welfare problems are a systemic feature of intensive broiler production rather than exceptional failures.

What You Can Do

Choose chicken from systems with documented low foot pad dermatitis scores
Advocate for mandatory foot pad dermatitis scoring and public reporting at abattoirs
Support campaigns for stocking density limits that maintain adequate litter quality
Reduce chicken consumption or substitute plant-based alternatives
Donate to Compassion in World Farming campaigns on broiler welfare standards
Engage with retailers about their supplier litter quality monitoring requirements