Stocking density in broiler chicken houses is one of the most important welfare determinants. Higher density increases competition, reduces activity, and elevates disease risk and leg health problems.
Stocking density is the most direct expression of how much priority a broiler production system places on animal welfare versus output maximization. At high densities, chickens cannot perform natural behaviors, air quality degrades faster, litter becomes wet and ammonia-rich, and leg health deteriorates as birds stand on poor surfaces. Each of these outcomes reflects welfare compromise. Lower stocking densities allow birds more behavioral freedom, better air, better litter, and better leg health. The welfare case for lower density is clear; the challenge is consumer willingness to pay the premium required to make lower density economically viable.