Pigs are among the most cognitively complex farm animals, capable of problem-solving, social learning, and play. Enrichment that engages their intelligence significantly improves welfare outcomes.
Pig cognitive complexity creates both welfare obligations and enrichment opportunities. A pig's ability to learn, remember, anticipate, and become bored means that environmental impoverishment has profound welfare costs. Pigs in barren concrete environments with nothing to investigate or manipulate show high rates of tail biting, ear biting, and other injurious behaviors that are symptoms of profound frustration. Effective enrichment engages their foraging motivation — rooting substrate, novel objects, scattered food, problem-solving feeders — and their social cognition — varied social groupings, play opportunities. The evidence shows that enrichment reduces injurious behaviors, improves immune function, and produces pigs with better stress resilience. Implementing adequate enrichment is one of the most cost-effective pig welfare interventions available.