This is a great slideshow of skin problems in dogs...is it anything like #12?
Skin Problems in Dogs Slideshow: Mange, Allergic Dermatitis, Impetigo, Ringworm, More Color or Texture Changes
Changes in a dog's skin color or coat texture can be a warning sign of several common metabolic or hormone problems. Be sure to ask your veterinarian about any significant changes to your dog’s coat.