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Originally Posted by chellabree  Oscar lost a large patch of hair on his back just below his shoulder blades. He had a skin scraping done and they found Demodex mites which were all dead indicating a previous infestation. The vet also thinks it could be something called immune mediated vasculitis. He's on steroids now and hopefully his hair will grow back. He has a comb-over to hide the bald spot. He doesn't itch anymore, but I would suggest using a mild aloe and oatmeal shampoo and even try tea tree oil to help with the itching. |
I was also going to suggest it might be demodex. Does it have a motheaten look? Do you have him on heartworm medication? If not, ask your Vet about Advantage Plus. It should get the mites to become non-active again. All dogs have mites - it's when they become active (could be due to stress or whatever) that they cause hair loss and itching.
First of all, you should get a qualified Vet to examine your dog. Good luck.