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Why does my dog still itch, lose hair, and smell bad after fleas?

Updated On September 23rd, 2025

Pet's info: Dog | Dachshund | Male | unneutered | 7 years old | 14 lbs

About 2 years ago our dog got infested with fleas. We treated him and after about 1 month all flees were gone.since then he has a bad order and loss of hair on ears and back...continuously scratches yo the point of causing sores...we have been to the vet nurmous times...he has been treated for a skin infection with antibiotics and steroids..nothing has worked....We have done everything you can think of with no luck. 3 different vets and 2 yrs the problem still exsist.

1 Answer

Most Helpful Answer

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Answered By Jenny, DVM

Veterinarian

Published on October 12th, 2017

I would start by getting the thyroid checked and having him checked for mange. Both can cause secodnary skin changes and infections in older dogs and unless those get addressed then the skin will not get better. Also I would look into a hypoallergenic or limited ingredient diet such as royal canin rabbit and potato or science diet D/D. Make sure you do a weekly bath with a medicated shampoo and keep the fleas under control. If none of these help I would talk to your vet about a newer medicines called Apoquel and cytopoint. They are made for itchy dogs to help treat inflammation and the itching

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