Farm Animals

Pig Social Bonds Welfare Science

Research into pig social bonds reveals that stable relationships reduce stress and improve welfare across the production cycle.

Key Facts

Pigs form preferential social bonds with specific individuals in stable groups
Bond formation requires shared experiences including feeding, play, and resting together
Disruption of established social bonds causes measurable stress responses in both individuals
Pigs show affiliative behaviors including allogrooming and resting in contact with preferred partners
Maintaining stable social groups from weaning to slaughter reduces lifetime stress exposure

Welfare Considerations

Pigs with established social bonds show lower cortisol, more play, and fewer aggressive interactions than those in repeatedly disrupted groups. Social stability is a fundamental welfare need that production systems should prioritize.

What You Can Do

Support pork from farms that maintain stable social groups from weaning to slaughter
Advocate for social group continuity as a core welfare standard in pig production
Choose farms certified by schemes that audit social group management practices