Heat Stress Management in Dairy Cows: Key Strategies for Farmers
As temperatures rise, managing heat stress in dairy cows becomes increasingly important for farmers, particularly in regions like southern Wisconsin. The temperature-humidity index (THI) is a critical measure used to assess heat stress levels in dairy cattle. Historical data indicates that southern Wisconsin typically experiences 25 days of severe heat stress (THI > 79) and 5.6 days of very severe heat stress (THI > 84) annually. By mid-April 2026, the area had already recorded several days of mild and moderate discomfort. To combat these challenges, farmers are encouraged to evaluate and optimize their ventilation systems. Proper ventilation, including the right number and type of fans, is essential to mitigate the effects of heat stress on dairy cows. 
