Moving gestating sows from individual stalls to group housing systems represents one of the most significant farm animal welfare improvements of recent decades, with documented benefits for physical and psychological welfare.
The prohibition on gestation stalls represents a welfare improvement grounded in decades of research showing that chronic confinement prevents natural movement, social interaction, and behavioral expression in highly social, intelligent animals. However, group housing is not uniformly welfare-positive — poorly managed systems with inadequate space or inappropriate mixing can generate high levels of aggression and injury. The welfare gains of group housing are realized through good design: adequate space, stable group composition, and feeding systems that reduce competition. Electronic sow feeding systems, despite higher capital cost, allow individual monitoring and feeding precision that benefits both welfare and productivity. The remaining challenge is completing the transition in countries with voluntary rather than mandatory frameworks.