All Hot and Bothered …

With temperatures soaring recently in to the mid 30’s it fuelled much conversation about ventilation and particularly fans. With a lot of farm opinion seeming to hinge around it being good just to “move the air about a bit” I thought it was a good time to discuss heat stress, before you spend your hard earned and regret it. This is the temperature and humidity index (THI) that tells us from ongoing research when cows suffer heat stress. It is altering as our understanding of cows continues to grow, for example at 32 °C and 45-95% humidity, moderate to severe heat stress occurs, rising to severe stress the closer it gets to 100% humidity. 

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