To minimize heat stress, combine continuous airflow with wetting every five minutes. That’s the recipe that Kansas State University researchers have discovered works best for cooling cows. In fact, cows exposed to this cooling regimen had a 50-percent reduction in their respiration rate at the end of the 90-minute treatment period.

“I think many systems are set up to only wet the cows every 15 minutes, and that’s just simply not enough,” says Mike Brouk, Kansas State dairy scientist.

The research was presented at the joint meeting of the American Dairy Science Association, the American Society of Animal Science and the Canadian Society of Animal Science held at the end of July.