Welfare in Outdoor Free-Range Pig Farrowing Systems

Outdoor free-range farrowing systems allow sows to express natural nesting behaviour but create specific welfare challenges around neonatal survival and weather exposure.

Key Facts

Outdoor farrowing in arc-shaped huts with straw bedding allows sows to build nests — a highly motivated behaviour blocked in indoor systems
Neonatal piglet mortality in outdoor systems averages 10-14%, with hypothermia and crushing the primary causes
Outdoor systems are predominantly used in the UK and Scandinavia; they represent around 25% of UK sow production
Sow body condition management is critical in outdoor systems — thin sows produce less milk and have reduced mothering ability

Welfare Considerations

Outdoor farrowing represents a genuine welfare improvement for sows — access to rooting material, space to build nests and freedom from farrowing crate confinement are all significant welfare gains. However, neonatal welfare is more challenging than in controlled indoor environments. Cold, wet weather in the first 72 hours of life is the primary piglet welfare risk. Good hut placement, straw management, heat lamp provision and frequent supervision during farrowing are the critical interventions for maintaining neonatal welfare in outdoor systems.

What You Can Do

Provide clean, deep straw bedding in farrowing huts and replenish regularly throughout the farrowing period
Position hut entrances away from prevailing winds and on well-drained, frost-free ground
Supervise farrowing closely and intervene promptly to dry, warm and ensure colostrum intake for weak piglets
Monitor sow body condition scores and adjust feeding levels to maintain BCS 3.0-3.5 through lactation