Heat stress is a major welfare and productivity problem in dairy and beef cattle as global temperatures rise. Understanding its impacts and mitigation strategies helps improve outcomes for millions of animals.
Heat stress in cattle causes acute discomfort and chronic health consequences that span from the individual animal to its offspring. At the physiological level, heat stress triggers a cascade of responses — panting, reduced feeding, altered blood chemistry — that impair welfare directly and reduce immune competence. The downstream effects include higher disease rates, reduced reproductive success, and impaired calf development. As global temperatures rise, heat stress is becoming an increasingly widespread and severe welfare problem across cattle-producing regions. Providing adequate shade, cooling infrastructure, and ventilation is not an optional welfare enhancement — for animals in hot climates, it is a basic welfare necessity that more regulatory frameworks should require.