Pigs are among the most cognitively sophisticated domestic animals. Recognizing their intelligence strengthens the welfare case for enriched housing and cognitively stimulating environments.
Pig cognitive capacity is increasingly recognized by welfare scientists as a central reason why barren housing systems cause profound suffering. A cognitively sophisticated animal in an unstimulating environment experiences something analogous to prolonged boredom and frustration. Pigs given access to cognitive challenges including rooting substrate, puzzle feeders, and novel objects engage persistently and show positive affective states. The evidence that pigs understand cause and effect, recognize themselves in mirrors, and form lasting social bonds strengthens the welfare argument that their experiences matter morally in ways similar to dogs and other animals whose cognitive status is less contested. Consumer education about pig intelligence has proven effective at shifting purchasing behavior toward higher-welfare products.