Farrowing crates prevent sow movement to protect piglets from crushing — but also cause significant welfare harm to the sow. New systems aim to protect piglets while giving sows more freedom. Evidence is promising but challenges remain.
Farrowing crate alternatives represent one of the most technically complex welfare reform challenges in pig farming. The welfare tension is genuine: farrowing crates prevent crushing deaths that cause suffering to piglets, while causing confinement stress to sows that express strong nesting motivation before birth and cannot satisfy it in a crate. Free farrowing systems that allow sow movement produce better sow welfare outcomes but require careful pen design and management to limit the increase in piglet crushing. Evidence from countries that have implemented free farrowing at scale — particularly Norway and Sweden — shows that the piglet mortality gap can be substantially closed with appropriate pen design (side creep areas, post rails at the correct height, deep straw for nest-building) and skilled stockmanship. The transitional approach — temporary crating for the highest-risk early days — may offer a welfare compromise where full free farrowing is not yet achievable.