My large Shepherd/Collie/Lab mix dog, Akeila, has trouble with her nose peeling also and we first thought it was a sunburn. Come to find out she has Lupus. Her eye lids, and ear tips also peel. The vet gave us steroid pills to give to her, but we have opted not to treat her w/ the steroids because of all the side effects. She does reasonably well if the weather isn't too harsh. Good luck.