Access to outdoor environments enables pigs to express a wide range of natural behaviors including rooting, exploring, and foraging that are suppressed in conventional indoor systems.
Outdoor access for pigs represents one of the most impactful welfare improvements available in pork production. Rooting in soil, exploring varied environments, experiencing weather, and foraging for diverse food items all engage deeply motivated behavioral systems in pigs. The behavioral contrast between outdoor-housed pigs and those in barren indoor environments is striking and measurable both behaviorally and physiologically. While outdoor systems present management challenges including disease, environmental impact, and climate vulnerability, the welfare benefits are substantial and justify the investment required.