A herd of cows being misted while in a pen. Over the image, a grey textbox reads "Managing Heat Stress in Dairy Cows Using the Temperature Humidity Index (THI)" with the Phason Controls logo above.

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Heat stress is a condition in which animals respond to an excessive heat load (EHL). In dairy cattle, it is crucial to maintain the normal function of various tissues and organs within a relatively narrow body temperature range. If body temperature rises above the level that animals can tolerate, there is a risk of organ dysfunction and even death.

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