Eek! I'll tag a member who's in florida for her input. @KMARINO.
What hair and skin supplement are you giving her? I'm more for the simple and true, such as salmon oil. I'm thinking the bumps and scabs are more environmental related. Have you tried giving her benedryl? 1 pill of the pink unflavoured/regular kind for every 25lb. My boys are around 50lb each, and I would give one morning and night.