Pigs are among the most intelligent domestic animals, yet most live in conditions that provide no cognitive stimulation. Understanding their intelligence helps motivate appropriate enrichment.
Pigs in intensive production systems are among the most cognitively complex animals in the worst welfare situations. An animal with dog-level intelligence confined to a concrete-floored pen with nothing to investigate, manipulate, or explore experiences severe boredom and frustration. This manifests in redirected behaviors including tail biting, which becomes a welfare crisis requiring painful tail docking of piglets - treating the symptom rather than the cause. The behavioral science is clear: pigs need manipulable materials (straw, rooting substrates, hanging chains or ropes), space to move and explore, and social interactions that match their natural behavioral repertoire. The welfare improvement from providing appropriate enrichment is large, the cost is modest, and the scientific evidence is unambiguous. The barrier is economic incentive and regulatory enforcement.