Pig Outdoor Systems: Welfare Benefits and Management Challenges

Outdoor pig production allows pigs to express natural behaviours including rooting and wallowing. Understanding the welfare benefits and challenges of outdoor systems informs production and purchasing decisions.

Key Facts

Outdoor pigs in the UK represent approximately 40% of sow production but far less of finishing pig production
Outdoor sows show higher rates of natural behaviour including rooting, nest building and social interaction
Free-farrowing outdoors in individual huts with bedding allows sow expression of natural maternal behaviour
Outdoor systems face welfare challenges including extremes of heat and cold, parasite burdens and predation
Wallowing access for pigs in summer is essential - pigs cannot sweat and rely entirely on water and mud for cooling
Outdoor finishing pigs have better access to enrichment and space but may face mud-related welfare issues in wet conditions
UK free-range pork standards require year-round outdoor access with continuous access to shelter

Welfare Considerations

Outdoor pig systems provide meaningful welfare advantages over indoor intensive systems: pigs can root, socialise normally, wallow, and express a fuller repertoire of natural behaviour. However, outdoor systems are not automatically high welfare - poor management of parasite burdens, inadequate shelter, and lack of shade in summer create welfare problems specific to outdoor production. The best outdoor systems combine natural behaviour opportunity with proactive health management and good stockpersonship.

What You Can Do

Choose RSPCA Assured or equivalent outdoor-certified pork products that verify genuine outdoor access
Look for free-range or outdoor-bred labels that specify welfare standards beyond basic outdoor access
Ask your butcher or supermarket about the specific outdoor welfare standards of their pork suppliers
Support campaigns for indoor pig welfare improvements that raise the floor for the majority of production