My dog has a bald spot on his leg. Why isn't the hair growing back?

Question

Duncan is a 1-year old mixed breed. About 6 weeks ago, he developed a bald spot on his hind leg. We treated it with hydrogen peroxide to clean the area, but never saw a physical wound. We also tried Benedryl, in case it was an allergic reaction. The area did not spread to other places on his body. It seemed to dry up and begin healing, but only a little of his hair is growing back. Do the attached photos indicate what the problem is? Or if there is a better way to treat the bald spot? Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 1 year old | 45 lbs

Destini R. Holloway, DVM · Accepted Answer

The bald spot appears to be hair loss only as the skin looks ok. I would suspect he may have an overpopulation of Demodexx mites on his skin that has caused this hair loss area. I would recommend taking Duncan to your vet for a skin test to check for mites. if mite overpopulation is the cause then he can get on medication to help resolve this and also prevent further spread of the hair loss and/or secondary bacterial infections on his skin. Another possible cause is that he may have licked the hair off due to an underlying itch/allergy. If the hair is regrowing, it may jsut need more time. It can take 2 months for hair to completely regrow. Best of luck wiht your pet Duncan and I hope his hair loss resolves soon. Take care.

My dog has a bald spot on his leg. Why isn't the hair growing back?

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