Farmed Animals

Pig Aggression Management and Welfare

Managing aggression in pig groups is essential for welfare, requiring attention to housing design, group composition, and enrichment provision.

Key Facts

Mixing unfamiliar pigs triggers intense aggression until a new hierarchy is established
Aggression causes injuries including ear and tail wounds, abscesses, and lameness
Providing enrichment reduces redirected aggression in barren environments
Adequate space allows subordinate pigs to escape dominant individuals
Stable groups maintained from birth to slaughter have significantly lower aggression

Welfare Considerations

Pig aggression causes significant welfare harm through physical injury, chronic stress, and reduced access to resources for subordinate animals. The most impactful management strategy is avoiding mixing of unfamiliar pigs. When mixing is unavoidable, providing additional space, enrichment, and escape routes reduces injury severity and duration of conflict. Good stockperson observation enables early intervention before serious injury occurs.

What You Can Do

Support welfare standards that require stable social groups in pig production
Advocate for enrichment requirements that reduce aggression in pig housing
Choose pork from systems with documented low injury prevalence
Raise awareness about pig aggression as a key welfare indicator
Support research into housing designs that reduce aggression in commercial pig units