Farrowing crates confine sows in a space too small to turn around for 4-6 weeks around birth, preventing crushing of piglets but also preventing all maternal behaviours, and the welfare debate around their use drives ongoing research into viable alternatives.
The farrowing crate welfare debate illustrates the tension between individual welfare harms and population-level mortality outcomes. Crates impose certain, significant welfare harm on every confined sow to prevent probable piglet deaths that could occur in loose housing. The ethical calculus depends on how one weighs maternal suffering against piglet mortality, and on how viable the alternatives actually are. Increasingly, the evidence shows that well-designed loose farrowing systems with appropriate training achieve piglet mortality rates comparable to conventional crates while eliminating the welfare costs of confinement. The direction of travel — toward crate-free farrowing — is clear; the pathway requires investment in system design, training, and transition support.