All my research says rain rot which is a lack of vitamin A. Can anyone explain more? Such as how much vitamin A they need, good vitamin A supplements, what exactly is rain rot (a fungus, a deficiency, both), best treatment options, ways to make the hair grow back, hiw libg before it goes away, what can we do to prevent it in the future, is it contagious? Im confused because all of my research seems to contradict itself. I always thought it was a fungus that was treated topically. When my gelding caught a small spot of it, we treated it with an OTC spray, it cleared up in a few days and that was that. These horses seem to come up with huge bald patches literally overnight.
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