Outdoor Pig Farrowing and Welfare Benefits

How outdoor farrowing systems benefit sow and piglet welfare compared to indoor intensive systems, and what the evidence shows.

Key Facts

Outdoor-bred pigs have significantly higher welfare outcomes including lower mortality rates and more natural behaviour
Outdoor sows can construct nests from available vegetation, fulfilling a strong behavioural motivation
Piglet mortality from overlaying is lower in outdoor arks than in indoor farrowing crates when well managed
Outdoor systems allow sows to express rooting, grazing, and social behaviours throughout their lives
The UK produces approximately 40% of its pork from outdoor-bred systems, one of the highest rates globally

Welfare Considerations

Outdoor pig farrowing represents one of the most significant structural welfare improvements available in the pig industry. The contrast with indoor farrowing crate systems is stark: a sow in an outdoor ark can move freely, build a nest before birth, interact with her piglets across their development, and root and forage throughout her life. These behaviours are not optional extras for pigs but expressions of strong motivational systems that cause genuine frustration when blocked. The welfare evidence consistently shows that outdoor and free-range systems produce better outcomes for both sows and piglets across multiple indicators, from stress hormones to behavioural repertoire to mortality rates.

What You Can Do

Choose pork labelled as outdoor-bred, free-range, or RSPCA Assured to support higher-welfare systems
Look for the RSPCA Assured, Freedom Food, or Soil Association labels when buying UK pork products
Ask restaurants and food service providers about the welfare status of the pork in their dishes
Support policy campaigns for the phasing out of farrowing crates and sow stalls in remaining systems
Reduce overall pork consumption and prioritise higher-welfare sources when you do purchase