Pigs are among the most cognitively sophisticated farm animals, demonstrating self-awareness, complex problem-solving, and rich social intelligence. Understanding pig cognition deepens the welfare case for improving conditions in commercial pig farming.
The cognitive sophistication of pigs has profound implications for how we evaluate the welfare costs of intensive pig farming. A being that can recognise itself in a mirror, experience empathy for companions, and demonstrate pessimistic cognitive bias under poor conditions is a being with a rich inner life that is capable of genuine suffering. The standard conditions of commercial pig production — barren environments, social disruption through weaning and regrouping, physical restriction in gestation crates, and inability to root or explore — create chronic psychological suffering in animals well equipped to experience it. The welfare science does not permit comfortable dismissal of pig suffering as mere instinct. Cognitive complexity in pigs makes the ethical stakes of how we farm them considerably higher than is commonly acknowledged.