Pigs are sophisticated social learners capable of observational learning, teaching, and cultural transmission. These abilities have profound implications for how we design pig housing and management.
The discovery that pigs are capable social learners strengthens the case for stable group housing systems. When pigs are repeatedly regrouped — as occurs in most commercial systems at weaning, transfer, and market stages — they lose accumulated social knowledge and must re-establish hierarchies through aggression. This is costly both in terms of welfare (injuries, stress) and productivity. Social learning also means that positive handling experiences can spread through groups: pigs that observe calm conspecifics being handled become less fearful themselves. Enrichment that challenges cognitive abilities — foraging tasks, problem-solving feeders — engages social learning circuits and reduces abnormal behaviors. Permanent social groups represent a high-welfare goal for commercial pig production.