Hi guys! My mustang has rain rot (ugh) and its my first time dealing with it as a horse owner. I'm headed to Tractor Supply and possibly my local tack store if needed. I'm going to get an iodine based shampoo, and was wondering of anyone had any product recommendations for getting rid of this nasty stuff. I have a trial size bottle of MTG, does anyone know how it works for rain rot? It's only a mild case, and the skin under the scurfy sections is gray and dry, not raw at all. He has some spots where hair is already growing back.