Stocking density is one of the most impactful welfare variables in pig production. Evidence-based density limits protect welfare across all stages of production.
Pigs at higher stocking densities have less space for normal behavior, increased competition for all resources, and reduced ability to escape aggressive conspecifics. The evidence linking overcrowding to welfare problems is robust and consistent. Space allowance requirements that reflect pig welfare science rather than minimum viability protect the basic behavioral and health needs of all pigs.