Pen design features including barrier boards, multiple resource stations, and appropriate space allowances significantly reduce aggression-related welfare harm in pig groups.
Pig pen design that applies behavioral science principles prevents a substantial proportion of aggression-related welfare harm without requiring changes to stocking density or genetics. Subordinate pigs that cannot escape dominant individuals experience chronic stress from repeated challenges. Simple physical barriers - wooden boards, suspended rubber curtains - allow subordinate animals to break visual contact and reduce ongoing harassment. Multiple resource distribution prevents the formation of resource guards who monopolize food, water, and resting areas.