Farm Animals

Pig Pen Design for Aggression Reduction

Pen design significantly influences aggression levels in pigs, particularly after regrouping. Evidence-based design can reduce injuries and improve welfare.

Key Facts

Aggression peaks in the 24-72 hours after pigs are mixed
Sufficient space, multiple feeding and drinking points reduce fighting
Visual barriers and escape routes reduce severe aggression
Covering all pigs with odour masking sprays reduces agonistic encounters
Poor lighting, overcrowding, and competition for resources increase aggression

Welfare Considerations

Pig aggression after mixing causes significant injury, stress, and welfare compromise. The skin wounds from fighting increase infection risk and cause pain for days. Evidence-based pen design - including adequate space, enrichment, and proper feeding arrangements - can substantially reduce the severity and duration of aggression events.

What You Can Do

Support welfare standards requiring minimum space and enrichment for pigs
Advocate for mixed-sex group housing regulations that include welfare design criteria
Choose pork products from farms with documented low aggression and injury rates