I have a clipped gray pony who really, really loves to get dirty! He recently has picked up some sort of fungus, maybe, on his neck body and legs--its like tiny black dots that I can't get off even in a good bath. They aren't really scabby like rainrot, but they are waxy and sticky to hair and skin. Has anyone seen this before and does anyone have a product they recommend to remove it? I am thinking about reclipping him--which I hate to do since it will cut off the shiny ends of the summer coat coming in!