Providing pigs with outdoor access or deep-straw housing delivers significant welfare benefits by enabling natural behaviors, but practical challenges related to land use and disease require careful management.
Indoor-housed pigs in barren environments are denied virtually every behavior that matters to them — rooting, wallowing, exploration, and social play. Outdoor access restores these opportunities and produces measurably better welfare across multiple indicators. The welfare difference between indoor barren and outdoor systems is among the largest of any livestock production comparison. Challenges including soil erosion, nutrient runoff, and disease risk from wildlife contact require management but do not negate the welfare case for outdoor access. Rotational grazing and housing design innovations address these challenges while maintaining welfare benefits. Consumer willingness to pay premiums for outdoor-reared pork is the primary driver of producer adoption.