Stocking density in broiler chicken production is one of the most important determinants of welfare outcomes. Overcrowding causes chronic stress, injury, and disease that affect billions of birds globally.
Stocking density is a master variable in broiler welfare because it directly affects almost every other welfare outcome — litter quality, air quality, injury risk, access to resources, and behavioral freedom. At commercially standard densities, broiler chickens spend their lives in environments where movement is severely restricted, air quality is compromised, and contact lesions are near-universal. Reducing stocking density below standard commercial levels produces measurable welfare improvements across multiple indicators simultaneously. The Better Chicken Commitment and similar standards specifically address density as a key requirement, recognizing its central role. Consumer demand for higher welfare chicken is the primary driver of industry adoption of lower density housing.