Pig Farrowing Pen Advanced Design Evidence

Farrowing pen design significantly affects the welfare of both sows and piglets during one of the most welfare-critical phases of pig production.

Key Facts

Conventional farrowing crates restrict sow movement to prevent piglet crushing but prevent all natural maternal behavior
Free-farrowing systems allow sow movement and nesting behavior but have higher piglet crushing rates without careful management
The PigSAFE pen design from Newcastle University demonstrated that farrowing pens can be designed to reduce crushing while allowing sow movement
Pre-farrowing nesting behavior is strongly motivated in sows and its suppression by crates causes significant frustration
Piglet crushing is highest in the first 72 hours and particularly during the first night after farrowing
Denmark and Sweden have banned farrowing crates, requiring free-farrowing systems with higher management demands

Welfare Considerations

Farrowing pen design represents one of the central welfare trade-offs in pig production: conventional crates compromise sow welfare severely while reducing piglet mortality, while free-farrowing systems restore sow welfare but require excellent management to prevent unacceptable piglet losses. Evidence shows that purpose-designed free-farrowing pens that incorporate physical features protecting piglets from crushing while allowing sow movement can achieve the welfare benefits of both approaches. The design features including piglet protection rails, nest areas with appropriate substrate, and pen dimensions that allow the sow to turn without crushing piglets are well established. The transition to free-farrowing requires significant investment in facility upgrade and stockperson training.

What You Can Do

Support pork producers who have invested in free-farrowing systems that protect both sow and piglet welfare
Choose pork certified to standards that prohibit or phase out farrowing crates
Advocate for legislative timelines for farrowing crate phase-out with support for farmer transition costs
Support research into optimizing free-farrowing pen design to minimize piglet mortality