Sow Welfare in Gestation Housing Systems

Housing systems for pregnant sows are a central welfare debate in pig production, balancing individual feeding control against behavioral freedom.

Key Facts

Gestation stalls confine individual sows in stalls 0.6m wide by 2.1m long for most of their 16-week pregnancy
The EU banned gestation stalls for most of pregnancy in 2013 with exceptions only for the first 4 weeks
The US has no federal ban but 10 states have prohibited gestation stalls following ballot initiatives
Group housing allows sows to move freely but creates competition challenges for feeding and social hierarchy
Electronic sow feeding systems deliver individual rations in group settings, combining freedom with controlled nutrition

Welfare Considerations

Gestation stalls prevent sows from performing virtually any natural behavior including walking, turning around, or social interaction. The psychological deprivation of permanent confinement in a space insufficient to turn causes stereotypic bar-biting, rooting on concrete, and sham-chewing in affected animals. Physiological evidence including elevated cortisol and reduced immune function confirms chronic stress. Group housing with properly managed space and feeding resolves most behavioral welfare problems but requires management investment to prevent injury from competition. The transition from stalls to group housing represents one of the most significant structural welfare improvements achievable in commercial pig production.

What You Can Do

Choose pork products from pork producers who have committed to eliminating gestation stalls
Support legislation banning gestation stalls in states and countries where they remain legal
Ask food companies about their gestation stall phase-out timelines and supply chain compliance
Reduce pork consumption and prioritize welfare-certified alternatives when purchasing