That happened to Callie. They did a skin scape and it was not mange, thank goodness. She just had really, really dry skin. The vet gave me some Omega Fatty Acid oil to put on her food once a day and her coat is looking great now. I also got a good mosturizing shampoo for her and once put a little of that oil on her. It really did the trick. She's beautiful again. 8) I would get it checked out if I were you. It could be mange or just dry skin but you won't know until it's checked. Good luck!