Individual gestation stalls severely restrict sow movement and behavior. Evidence-based welfare science and industry commitments are driving a global transition to group housing.
The welfare case against individual gestation stalls is comprehensive. Sows in stalls cannot perform natural behaviors including foraging, social interaction, and physical exercise. The physical confinement causes muscle wasting, bone weakening, joint problems, and cardiovascular fitness reduction. Behavioral indicators of psychological suffering — repetitive stereotypies, depression-like states, and redirected oral behaviors — are consistently more prevalent in stall-housed than group-housed sows.
The welfare improvement from group housing is real but not automatic. Poorly managed group housing with insufficient space, inadequate feeding stations, or inappropriate mixing of unfamiliar animals creates aggression problems that compromise welfare in different ways. Evidence-based group housing management — including gradual mixing protocols, ample loafing space, and ESF systems that prevent feed competition — delivers the expected welfare benefits.
The EU transition has demonstrated commercial viability of group housing. Many US retailers, food companies, and fast food chains have made commitments to gestation stall-free pork. Progress is uneven globally — many countries maintain stall systems without restriction. Consumer pressure through purchasing choices and corporate engagement campaigns continues to drive change.