The research underpinning gestation housing reform and what successful transition to group sow housing looks like.
The transition from gestation crate to group sow housing represents the most significant farm animal welfare improvement implemented at commercial scale in recent decades. Research validating the welfare benefits of group housing — reduced stress, increased behavioral freedom, improved reproductive performance in well-managed systems — provided the scientific foundation for EU legislative change and voluntary industry transition. The transition is not welfare-neutral: initial mixing fights in group systems can cause injuries, and welfare outcomes in group housing depend significantly on management quality, group size, feeding system design, and space allowance. The welfare trajectory is positive because group housing enables welfare that crate confinement categorically prevents, and because operational experience in markets that have completed the transition demonstrates that good outcomes are achievable at commercial scale with appropriate management investment.