Research into pig cognition has revealed remarkable intelligence and problem-solving abilities that have direct implications for what enrichment programs must provide to meet pig welfare needs.
Research into pig cognition has progressively revealed a level of intelligence that makes conventional intensive housing systems appear increasingly unjustifiable. The capacity for mirror self-recognition, social learning, and optimism/pessimism cognitive bias assessment places pigs in the company of species widely recognized as having rich inner lives requiring complex environments. Chronic stress from barren environments does not merely affect behavioral indicators; it shapes the pig's cognitive orientation toward pessimism, meaning that deprived pigs see ambiguous situations as threatening. Enrichment that provides genuine cognitive engagement — foraging challenges, problem-solving opportunities, and varied social interactions — is not a luxury but a welfare necessity for an animal of this cognitive complexity.