I found an australian shephard wandering in and out of traffic on a busy highway today, and of course picked him up. There weren't even any houses nearby to ask, so I took him home. He seems fairly healthy although quite matted and also seems to have some kind of skin condition. I have him in a stall in my barn for now, in case it is something my dogs can get. The hair is gone on his belly, armpits, and back and inside of hind legs. It is definitely red and irritated, and a little scabby but most of it is pretty smooth. It is hot to the touch. I gave him a bath with a betadine solution and sprayed hydrocortisone on it. What are the possibilities for what this could be? I really don't have alot of extra money to be spending in vet bills right now, but want to make sure he is ok before he goes in with my dogs. Is there any way to tell if it is mange without taking him to the vet for a skin scraping? I am hoping it is just some sort of allergy that is treatable...he did have a flea collar on and not many fleas at all. I haven't had much experience with dog skin conditions, any ideas?? Thanks!!