Outdoor access for pigs provides significant welfare benefits including rooting opportunities, fresh air, natural light, and behavioral expression that indoor systems cannot replicate.
Outdoor access transforms pig welfare by providing what indoor systems cannot: real substrate for rooting, natural light, fresh air, and an environment that changes and provides genuine behavioral complexity. Studies consistently show that outdoor pigs root more, explore more, and show fewer stereotypic behaviors than indoor confinement pigs. The welfare benefits extend beyond behavior to physiological stress indicators — outdoor pigs have lower baseline cortisol. The welfare argument for outdoor access is strong, though management must address the real disease and predation risks that outdoor systems present.