This could be ringworm, and you won't always see a "ring" in dogs. They'd have to culture it and grow it out for 10-14 days. What blood tests were run?
__________________ ~ A friend told me I was delusional. I nearly fell off my unicorn. ~ °¨¨¨°ºOº°¨¨¨° Ann | Pfeiffer | Marcel Verdel Purcell | Wylie | Artie °¨¨¨°ºOº°¨¨¨° |