Farmed Animals

Pig Social Housing and Group Dynamics

Pigs are highly social animals whose welfare depends significantly on appropriate group composition and management.

Key Facts

Pigs form stable social hierarchies with individual recognition
Mixing unfamiliar pigs causes intense aggression and injury
Sows in groups are strongly motivated to build separate nesting areas
Litter mates maintain strong social bonds throughout life
Stable group housing reduces aggression and improves welfare outcomes

Welfare Considerations

Pig social welfare depends on appropriate group management. Mixing unfamiliar pigs causes severe aggression and stress until a new hierarchy is established. Maintaining stable social groups, providing adequate space to avoid repeated confrontations, and designing housing that allows subordinate pigs to escape dominant individuals are all important for reducing aggression and improving welfare.

What You Can Do

Support welfare standards that require stable social groups for pigs
Advocate for housing design guidelines that reduce mixing stress
Raise awareness about the welfare cost of social mixing in pig farming
Support research into pig social behaviour and housing needs
Choose pork products from systems with documented welfare standards