My 28 yr old Thoroughbred had an episode Friday that we thought was heat exhaustion but he recovered with less than an hour of cold hosing without being giving any fluids. He also showed no signs of dehydration. We had noticed that he wasn't sweating until after we hosed him. Saturday he began showing signs again so we started cold hosing him and he was fine within a half hour or so. Yesterday the same thing. Today I hosed him before he started acting hot. Each time we have noticed he is not sweating until after we hose him and then he isn't sweating like a 1400# horse should be in 100 degree heat. The vet is thinking he has developed anhidrosis which is when the body no longer sweats. Has enyone ever dealt with this? I've done some research and found it is most common in Thoroughbreds but usually when they change climates or are worked when its hot out. My boy has lived here at least 6 years that I know of and outside of an occational ride in the fall he hasn't been worked at all.
Any comments or info would be greatly appreciated. This horse is my love and I worried sick. Thanks