Heat stress is a major welfare issue for cattle worldwide, causing suffering, reduced productivity, and increased disease. Providing adequate shade and cooling is both an ethical obligation and a sound management practice.
Heat stress causes measurable suffering in cattle. Physiological responses include panting, increased standing time (to allow heat dissipation from the underside), bunching in shade, and reduced rumination. Severe heat stress can cause death in vulnerable animals. Providing shade reduces these responses significantly. All cattle housing and pasture systems should incorporate shade as a minimum welfare requirement, with active cooling systems prioritized for high-producing dairy herds and in regions with extended hot seasons.