Pigs are among the most cognitively sophisticated farm animals, comparable to dogs in many cognitive domains. Understanding pig intelligence has profound implications for how we assess and address their welfare needs.
The cognitive sophistication of pigs is not merely an academic curiosity — it has direct welfare implications. An animal that can reflect on its own situation, maintain complex social relationships, and experience anticipatory states of positive or negative valence is an animal whose subjective experience is richer and more morally significant than a simple input-output machine. The welfare failures of intensive pig farming — frustration, boredom, social conflict, fear — cause suffering in animals capable of experiencing these states with a depth that the evidence suggests is substantial. Consumer and regulatory responses to pig welfare should be calibrated to what science now tells us about pig cognitive and emotional lives, not to older assumptions that treated pigs as simple stimulus-response organisms.