Just an update.
I've switched her to the all red meat grain free kibble, and if anything it's definately helped with her weight. I'm also bathing her every 2 days with a yeast shampoo, and will be giving her rub downs of a cream for the same yeast thing. She seems to love the baths which is very weird considering she hates baths. Haven't had any success yet although she's only been on the kibble for 3 weeks, and the baths for 1 week. Her hair does appear to be growing back, and her sores are all but a rash now. I'm thinking this may be a yeast infection as she sweats in all the noted areas, and smells very bad! Fingers crossed!!!