Pig Heat Abatement in Summer Farming

Pigs are particularly vulnerable to heat stress and lack of sweat glands, requiring proactive cooling systems to protect welfare during hot weather.

Key Facts

Pigs have very few sweat glands and rely on mud wallowing and shade for thermoregulation
Heat stress begins at ambient temperatures above 27 degrees C in pigs at typical humidity
Pregnant sows are particularly vulnerable - heat stress causes embryo mortality and reproductive failure
Cooling systems including sprinklers, evaporative cooling, and mud wallows significantly reduce heat stress
Heat stress reduces feed intake, growth rate, and immune function - it is measurable in behavior and physiology
Climate change is increasing the frequency and severity of heat waves affecting pig welfare globally

Welfare Considerations

Pigs in summer heat without adequate cooling experience genuine suffering - panting, lethargy, and in severe cases heat stroke. Indoor pigs in poorly ventilated barns face the greatest risk, while outdoor pigs without mud wallows or shade cannot thermoregulate. Heat stress is a welfare emergency that can develop rapidly during heat waves. Proactive cooling infrastructure investment, particularly for breeding herds, protects welfare and productivity simultaneously.

What You Can Do

Ensure all pig housing has ventilation capacity adequate for hot weather before summer
Provide outdoor pigs with mud wallows or misters and adequate shade structures
Monitor indoor temperature and humidity - use forced ventilation and sprinklers above 27 degrees C
Adjust feeding times to cooler parts of the day during heat waves
Provide excess clean drinking water during hot weather - water consumption increases significantly
Develop an emergency heat response plan including contact numbers for veterinary support