Livestock Heat Adaptation and Climate Welfare

Climate change is increasing heat stress across livestock production regions. Understanding adaptation strategies helps reduce suffering for millions of farm animals.

Key Facts

Heat stress costs the US livestock industry over 2 billion dollars annually in production losses
Dairy cattle produce significantly less milk and have more health problems during heat events
Broiler chickens have minimal capacity to dissipate heat through panting at high ambient temperatures
Evaporative cooling reduces heat stress in pigs by up to 60 percent
Genetic selection for heat tolerance has accelerated as temperatures rise

Welfare Considerations

Heat stress in livestock causes both acute welfare harms during heat events and chronic welfare decline in persistently warm conditions. Dairy cows in heat stress reduce feed intake and milk production while showing behavioral signs of thermal discomfort. Pigs in hot weather cease activity and spend more time lying in contact with cool surfaces. Broilers have the least capacity for thermoregulation and face the highest mortality risk in heat events. Cooling infrastructure including fans, misters, shade, and wallowing areas for pigs significantly reduces heat stress welfare costs.

What You Can Do

Advocate for climate adaptation standards in national farm welfare guidelines
Support producers investing in heat management infrastructure
Choose animal products from producers in cooler climates or with documented heat management
Reduce livestock product consumption as a climate action that also reduces welfare harms
Support research into heat-tolerant livestock breeds and management systems