Pigs are among the most cognitively complex farm animals, yet most commercial facilities provide minimal environmental enrichment. Increasing enrichment complexity dramatically improves pig welfare.
The cognitive and social complexity of pigs makes barren commercial environments particularly problematic from a welfare perspective. Pigs deprived of rooting substrate, manipulable objects, and social complexity develop stereotypies, show increased aggression, and exhibit chronic stress indicators. Research consistently shows that even moderate enrichment — substrate, hanging objects, and foraging materials — produces measurable welfare improvements including reduced cortisol, better growth rates, and lower rates of injurious behavior.