Gestation crates confine pregnant sows in spaces too small to turn around, causing chronic physical and psychological suffering.
Sows in gestation crates cannot perform basic natural behaviours: turning around, rooting, socialising or walking. This causes severe frustration and stereotypic behaviour such as bar-biting. Muscle wastage occurs from immobility. The scientific consensus is that gestation crates cause significant animal suffering. They represent one of the most welfare-damaging practices in commercial pig farming.