Pig Litter Management and Welfare in Farrowing Systems

How farrowing environments are managed from birth through weaning has profound effects on piglet welfare, survival, and the welfare of the sow.

Key Facts

Piglet mortality in the first week of life is 10-20% in commercial systems, largely from crushing by the sow and starvation
Crate-based farrowing is designed to prevent crushing but severely restricts sow movement and natural behavior
Free farrowing pens with protective areas for piglets (creep rails) allow sow movement while reducing crushing risk
Colostrum intake in the first hours of life is critical — piglets that fail to nurse sufficient colostrum face high mortality
Sows in free farrowing systems show stronger maternal behavior including nest-building, vocalization, and piglet retrieval
Hypothermia is a leading cause of neonatal piglet death; heat lamps and bedding in creep areas reduce this risk
Low-birthweight piglets require additional monitoring and supplemental feeding to ensure adequate colostrum intake
Weaning age significantly affects both piglet and sow welfare; earlier weaning reduces sow welfare while being economically motivated

Welfare Considerations

Farrowing is the most welfare-intensive period in commercial pig production, with competing welfare concerns for both sow and piglets. Traditional crate systems protect piglets from crushing but inflict severe welfare costs on sows, who cannot perform any maternal behavior and spend weeks in painful immobility. The transition to free farrowing is complex — without good design and management, piglet mortality may rise. The evidence now supports that well-designed free farrowing systems with appropriate protective features can achieve piglet survival rates comparable to crates while dramatically improving sow welfare. Investment in training stockpeople to identify vulnerable piglets and provide targeted support is as important as infrastructure in achieving good outcomes.

What You Can Do

Support pork producers transitioning to free farrowing systems with certification and purchasing choices
Advocate for legislation requiring free farrowing or time-limited crating with minimum maternal behavior opportunities
Donate to organizations developing and promoting free farrowing system design and management training
Encourage food companies to set and report on farrowing crate phase-out timelines in their supply chains
Learn about sow welfare research and share findings with policy contacts and food industry stakeholders
Support agricultural schools that train the next generation of pig farmers in welfare-positive farrowing management
Reduce or replace pork in your diet to reduce overall demand for intensive pig production systems