Pigs are among the most cognitively complex farm animals, with capabilities including mirror self-recognition, tool use, and complex social learning that strengthen the case for better welfare standards.
The cognitive complexity of pigs creates a direct ethical obligation for the conditions in which they are kept. An animal capable of metacognition, social memory, and complex learning experiences deprivation in a qualitatively different way from a less cognitively complex species. The frustration of a pig that cannot root, explore, or engage in social learning in a barren concrete pen is not simply physical; it involves cognitive and emotional dimensions that compound the welfare harm. Understanding pig intelligence does not add a new welfare requirement so much as reinforce the urgency of meeting existing ones: space, enrichment, social complexity, and environmental variation.