Pig Group Housing and Social Welfare

Group housing for pigs can improve social welfare but requires careful management to prevent aggression and injury.

Key Facts

Pigs are social animals that establish stable hierarchies with clear dominance relationships
Regrouping pigs from different litters causes intense aggression as new hierarchies are established
Adequate space allowances reduce aggression and its welfare consequences in grouped pigs
Enrichment and space significantly reduce the duration and intensity of aggression during regrouping
Sow group housing systems in gestation perform better for sow welfare than individual stalls when well managed

Welfare Considerations

Group housing for pigs creates both welfare opportunities and challenges. Pigs in stable social groups with adequate resources and space live more behaviorally fulfilled lives than individually confined animals. But poorly managed group housing — with inappropriate stocking densities, abrupt regrouping, or inadequate enrichment — creates conditions for chronic aggression and injury. Good stockmanship and system design determine whether group housing delivers its welfare potential.

What You Can Do

Support pork from farms using stable-group sow housing with adequate space and enrichment
Advocate for minimum space allowances per pig in commercial housing regulations
Support campaigns to ban individual gestation stalls for sows in your jurisdiction
Reduce pork consumption to reduce demand from intensive group housing systems
Learn about the differences between welfare-positive and welfare-negative group housing designs