Broiler Chicken Stocking Density: Welfare Evidence and Standards

Stocking density in broiler chicken production is one of the most significant determinants of welfare outcomes, with higher densities causing increased lameness, skin lesions, and behavioural restriction.

Key Facts

The EU Broiler Directive sets a maximum stocking density of 33 kg/m2, with derogations to 42 kg/m2
At 42 kg/m2, birds have approximately the footprint of an A4 sheet of paper at slaughter weight
High stocking density increases litter moisture, leading to hock burns and foot pad dermatitis
Broilers at high density show reduced movement, dustbathing, and foraging behaviour
Higher welfare schemes such as RSPCA Assured set maximum densities of 30 kg/m2

Welfare Considerations

Research consistently shows that stocking density above 30 kg/m2 impairs broiler welfare. At commercial maximum densities, birds cannot perform natural behaviours, suffer elevated rates of leg disorders, and have increased prevalence of contact dermatitis from wet litter. The financial savings from higher stocking density are largely internalised by producers while welfare costs are borne entirely by animals. Reducing stocking density is one of the most effective single interventions for improving broiler welfare at scale.

What You Can Do

Choose chicken products certified to higher welfare standards with lower stocking densities
Engage with retailers and restaurants about sourcing from farms below 30 kg/m2
Advocate for regulatory reform to lower maximum permitted stocking densities
Support campaigns such as the Better Chicken Commitment which specifies a 30 kg/m2 maximum