Sow stall bans have been implemented in multiple jurisdictions. Reviewing welfare outcomes from these implementations provides evidence for ongoing policy reform.
Sow stall ban implementation evidence demonstrates that the welfare benefit is real but depends on implementation quality. Jurisdictions with well-resourced transitions including farmer training, appropriate stocking density requirements, and enrichment mandates show genuine welfare improvements. Those that simply require system change without the accompanying management standards have seen variable outcomes including welfare problems from poorly managed group aggression. The policy lesson is that bans must be accompanied by positive standards for what group housing must provide, not just what it must not include. The Swedish example over 30 years demonstrates long-term commercial viability of welfare-positive sow housing.