Farm Animal Welfare

Pig Outdoor Wallowing and Thermal Welfare

Wallowing access is essential for pig thermoregulation and natural behaviour in outdoor systems during warm conditions.

Key Facts

Pigs cannot sweat and rely entirely on external cooling for thermoregulation
Wallowing in mud provides cooling through evaporation and insulation from direct sun
A core temperature above 40 degrees Celsius causes heat stress and suffering
Wallowing is also a natural social behaviour performed by wild pigs
Wallowing areas require water supply and shade to maintain welfare during extended hot periods

Welfare Considerations

Wallowing is not optional enrichment for outdoor pigs - it is a physiological necessity for thermoregulation in warm conditions. Adequate wallowing access dramatically reduces heat stress welfare impacts in outdoor pig systems.

What You Can Do

Ensure outdoor pigs have access to wallowing areas or sprinklers when temperatures exceed 25 degrees Celsius
Provide shade structures in outdoor pig areas to reduce solar radiation load
Advocate for outdoor pig welfare standards requiring documented thermal management in warm periods