Cows create a lot of body heat and use a large amount of energy in the process of producing milk. ?When you are comfortable, a cow is warm; when you are hot, a cow is miserable; and when you are cold, a cow is probably fine,? explained Dr. Lou Armentano, a professor in the Department of Dairy Science at the University of Wisconsin-Madison. On those hot summer days, cows immediately respond to the high temperature with decreased milk production.
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