there does not seem to be any bumps, just bald patches on the inside of hind legs (up high) and on shoulders. not the blanket. we tried H&S dry skins shampoo. and we also tried novlasan but that did cause a rash.
We are in north FL. he eats Safechoice with flax seed and peanut hay and he is on Flex Force joint supplement.
Are you sure he isn't just shedding? One of my blanketed ones is shedding like gangbusters, the other is holding onto his bunny-fur coat. The two unblanketed ones are still not showing any signs of shedding, but one's pregnant (NO predicting broodmares) and the other sheds notoriously late. Another thing that can cause bald patches, especially this time of year, is lice. They're easy to see if you look close: like itty bitty grains of brown rice that move.