Pig Gestation Crates: Welfare Science and the Case for Reform

Gestation crates — individual metal stalls confining pregnant sows — are among the most welfare-damaging practices in industrial pig farming, with growing scientific and legislative pressure for their elimination.

Key Facts

Gestation crates measure approximately 0.6 x 2.0 metres — too small for sows to turn around or take more than a step forward
Approximately 6 million sows in the US are kept in gestation crates for most of their reproductive lives
The EU banned gestation crates after the first 4 weeks of pregnancy in 2013; several EU member states have stricter bans
Nine US states have banned gestation crates; many major food companies have made cage-free pork pledges
Scientific consensus holds that gestation crate confinement causes severe psychological distress and physical harm
Sows in crates develop stereotypic behaviors including bar-biting, head-weaving, and sham-chewing
Muscle atrophy and joint problems from lack of movement impair sows' ability to walk normally when released for farrowing
Group housing with proper management achieves comparable productivity to crate systems while dramatically improving welfare

Welfare Considerations

Gestation crate confinement prevents sows from performing any natural behavior for months at a time. Pigs are highly intelligent, curious animals — more cognitively complex than dogs — who suffer profoundly from inability to move, explore, or interact socially. Stereotypic behaviors are recognized as signs of chronic stress and psychological dysfunction. Physical consequences include pressure sores from lying on hard floors, urinary tract infections, and leg weakness. The duration of confinement is extreme: sows may spend the majority of their 4-month pregnancies in crates across multiple reproductive cycles. The welfare science on gestation crates is unusually clear: virtually every major animal welfare body has concluded that individual crate confinement causes serious suffering.

What You Can Do

Choose pork products certified crate-free (Certified Humane, Animal Welfare Approved, GAP 2+)
Advocate with your food retailers and restaurants to commit to gestation crate-free sourcing
Support state-level ballot initiatives banning gestation crates
Donate to Humane Society of the United States campaigns targeting gestation crate elimination
Reduce pork consumption or substitute plant-based alternatives
Contact your legislators to support federal farm animal welfare legislation