The new horse I am fostering is COVERED in rain rot. I have had him for a week now. I have given him two selsun blue medicated baths, and three regular baths (cuz he won't stop rolling lol). Twice I covered him in Fung-a-Way spray, and twice i've doused him with MTG. So my question is, is there anything else on the market that I can do to help him grow his hair back and keep the fungus away? And how long should I wait to start riding him? His hair is like tiny peach fuzz right now lol.