The system in which sows give birth and nurse piglets has major implications for sow and piglet welfare.
Farrowing crates prevent sows from performing the nest-building behaviour they are highly motivated to express before parturition. This frustration causes significant distress. For the 3-5 weeks of confinement, sows cannot lie in a natural posture, groom themselves fully, or interact normally with their piglets. Free-farrowing systems with well-designed crates reduce crushing risk while allowing sow movement. The EU is moving toward banning farrowing crates, requiring a 10-year transition to alternative systems.