Stocking density is one of the most important determinants of poultry welfare. Understanding the welfare science behind space allowances helps evaluate different production systems.
Stocking density is a fundamental welfare variable because it determines the physical space available for each bird's basic behavioral expression. At high densities, birds cannot perform normal locomotion, wing stretching, social interaction, or behavioral thermoregulation. The combination of high density with fast-growing breeds and near-continuous light creates a welfare-compromised environment where the cumulative burden on individual birds is significant. The welfare science is clear that lower stocking densities, while reducing productivity per unit area, substantially improve welfare outcomes. Consumer willingness to pay modest price premiums for better welfare can drive industry adoption of lower densities.