Pigs and Social Housing in Intensive Systems

Group housing for pigs has expanded significantly in some regions, but the welfare benefits of social housing are only realized when group composition, space allowance, and management are appropriate.

Key Facts

The EU banned sow stalls except during service and early pregnancy — group housing is now standard for most of gestation
Mixing unfamiliar pigs causes acute aggression that can result in severe injuries
Competitive access to feeding is a major welfare challenge in group-housed sow systems
Electronic sow feeding systems can reduce competition and monitor individual intakes
Space allowance below minimum recommendations increases aggression and injury
Group housing with good management produces better welfare outcomes than single housing, but poorly managed groups may not

Welfare Considerations

The transition from individual stalls to group housing for pigs represents meaningful welfare progress, but the welfare benefits are not automatic. Pigs introduced to unfamiliar groups engage in intense dominance-establishing aggression that causes real injury. Insufficient space, inadequate feeding infrastructure, and poorly designed groups can produce group housing systems where welfare outcomes are no better — or worse — than the stalls they replaced. The science is clear that well-managed group housing with sufficient space and resources is superior, but achieving that in practice requires investment, training, and management standards that regulation has not always demanded.

What You Can Do

Support farming standards that include not just group housing requirements but space and management specifications
Choose pork certified to standards with specified minimum space allowances
Advocate for enrichment requirements in group housing systems for pigs
Support industry training programs on welfare-conscious pig group management
Fund research into optimal group composition and management for sow welfare in intensive systems