Heat Stress in Poultry: Detection and Prevention

Heat stress causes significant mortality and welfare harm in poultry, particularly broiler chickens, with climate change increasing the frequency and severity of heat events.

Key Facts

Broilers become heat-stressed above 27C and begin dying above 38C
Panting is the primary thermoregulatory mechanism for birds but becomes ineffective at extreme temperatures
Tunnel ventilation systems that move high-velocity air through houses reduce heat stress significantly
Cold water provision with electrolytes maintains hydration during heat events
Stocking density reduction during summer months reduces within-flock heat generation

Welfare Considerations

Heat stress in poultry is a severe welfare problem - birds unable to thermoregulate effectively suffer progressive physiological deterioration including cardiovascular collapse, neurological signs, and death. The suffering of birds in inadequately ventilated houses during heat events is significant. Mass mortality events involving thousands of birds dying from heat represent welfare failures at scale. Climate change is increasing the frequency of heat events that exceed conventional ventilation capacity, making investment in enhanced cooling infrastructure increasingly essential for welfare.

What You Can Do

Advocate for mandatory heat stress management plans in commercial poultry welfare regulations
Support poultry certification programs with specific heat stress prevention requirements
Choose chicken products from certified producers with documented cooling infrastructure
Learn about thermal comfort requirements for different poultry species and production systems
Reduce poultry consumption during periods of extreme heat to reduce demand pressure on welfare-compromised flocks