The welfare case for replacing farrowing crates with alternative farrowing systems is well established, though the transition requires management changes to maintain piglet survival.
Farrowing crates prevent sows from performing nesting behaviour, which they are strongly motivated to perform in the days before giving birth. Frustration of nesting motivation causes significant pre-partum stress. Confinement during lactation prevents normal maternal behaviour and limits sow-piglet interaction. Alternative systems including free-farrowing pens with creep areas and turn-around crates allow partial movement and natural behaviour while managing piglet crushing risk. Evidence from countries with high-welfare farrowing systems demonstrates that piglet survival need not be compromised when management quality is maintained.