Heat stress is a major and growing welfare concern in dairy and beef cattle. Understanding physiological impacts and management options helps prioritize improvements in affected production systems.
Heat stress causes genuine suffering in cattle through physiological stress responses, disrupted feeding and digestion, and in severe cases, heat stroke and death. The experience of heat stress involves behavioral and physiological changes that indicate acute negative states, including prolonged panting, seeking shade, standing in water, and cessation of normal grazing behavior. Welfare improvements including shade provision, water availability, and evaporative cooling systems are proven and often economically justified through production benefits. Climate change is making heat stress a worsening problem across livestock production regions, making proactive welfare planning essential for producers in affected areas. Reducing livestock numbers per unit of land and transitioning to breeds adapted to local conditions are long-term structural welfare responses.