Farrowing crates — metal cages that confine sows during and after birth — are one of the most contested practices in pig farming, preventing sows from expressing natural maternal behaviour.
Farrowing crates cause significant suffering. The inability to turn around for weeks at a time causes physical discomfort and postural fatigue. The frustration of nest-building behaviour — a powerful instinct in sows — is expressed through repetitive, futile rooting on bare floors. The inability to respond to piglets physically constrains the sow-piglet bond. These welfare costs must be weighed against the genuine risk of piglet crushing — but the evidence from countries that have banned crates shows that well-designed free farrowing systems can address both concerns. The persistence of farrowing crates in most pig-producing countries reflects economic inertia rather than the absence of viable alternatives.