The quality of litter in broiler houses is one of the most important and most controllable determinants of chicken welfare, affecting foot health, respiratory health, and behavioral expression.
Litter quality in broiler houses is a welfare indicator that accumulates over the production cycle: excellent management at day 1 and poor ventilation at day 30 produces deteriorating litter conditions that create progressive welfare harm in the final weeks of the cycle, when birds are largest and most vulnerable. Foot pad dermatitis develops when birds stand continuously on wet, ammonia-laden litter — a condition that causes pain, reduces mobility, and impairs feed intake in affected birds. The EU approach — linking measured litter quality and FPD rates to permitted stocking density — creates a regulatory feedback loop that rewards good litter management with higher productive capacity. This outcome-based approach is more effective at driving real welfare improvement than prescriptive input standards that specify litter type but not management quality.