The global transition from individual gestation stalls to group sow housing is improving welfare for millions of pigs, but implementation quality determines whether welfare gains are achieved in practice.
The gestation stall transition represents one of the largest single welfare improvements in modern farm animal policy. Sows in gestation stalls cannot turn around, perform nesting behavior, exercise, or engage in social behavior for months at a time — a constraint that causes chronic frustration, stereotypic behavior, and cardiovascular deterioration. Group housing eliminates these constraints but requires careful management of competitive feeding and aggression. The welfare outcome depends critically on implementation: poorly designed group systems can produce worse welfare than well-managed stalls through chronic injury and subordinate sow food deprivation. Investment in electronic sow feeding, appropriate space allowances, enrichment, and trained stockpeople converts the regulatory requirement into genuine welfare improvement.