We bought a cooler from someone else with the intention of using it, but after having our steers & heifers in our old bank barn & 5 turbo fans, they kept their hair & grew more. With our hot temps in the 90's & 100's this year, they kept thier hair well by rinsing, combing & brushing 2-4 times a day & keeping them cool. As soon as they started puffing from heat, we would rinse. We never let them sweat. Last year we used grow & shine on our steers which helped greatly too. Not supposed to use on heifers. When we stopped giving it to him after shows & sale barn time, he started shucking hair big time. We won grand champ with him at our fair & won grand in 3 open shows. My sister in law had a "cool calf" unit I believe & they liked the safety door that opened if the electric went out. I know ammonia odor was an issue with the cooler. They even tried the ammonia powder stuff on the floor, but didnt help much. Had to clean it out twice a day. Hope some of that helps.