Scientific research on pig intelligence and emotional complexity has profound implications for how we assess the welfare needs and moral status of pigs in agricultural systems.
Research on pig intelligence is transforming scientific and public understanding of what farming pigs in intensive conditions actually means for the animals involved. Pigs that engage in empathy, play, problem-solving and complex social relationships are experiencing a rich inner life that is severely compromised by barren cages, tail docking, and overcrowded concrete floors. The judgement bias research is particularly significant — demonstrating that pigs in poor welfare environments develop a pessimistic world view that persists even in positive situations, showing that welfare conditions affect deep emotional states rather than just moment-to-moment comfort. This evidence demands a fundamental reconsideration of intensive pig farming as an ethical practice.