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Why are my dogs still itchy and losing fur after flea treatment?

Updated on September 23rd, 2025

My two dogs are recovering from a major flea infestation that caused them both to lose a lot of fur on their behinds. We've been treating them with Seresto flea collars (as reccomended by our vet) and the fleas seem to be gone, but the dogs are still itchy and their fur doesn't seem to be growing back yet. Is their any way I can help them with fur growth and relieve their itching?

1 Answer

Most Helpful Answer

Dr. Melanie, BVSc MS

Answered By Dr. Melanie, BVSc MS

Veterinarian

Published on January 18th, 2018

When you have a heavy flea infestation, you also have to disinfect the environment as well. Wash theirs bedding in hot soapy water, and vacuum the furniture and carpet surfaces. You can use a spray to kill fleas in the house, such as Indorex, or a flea bomb would work well to kill the fleas in the home. Dogs who have heavy flea infestations can also develop flea allergies, which would lead them to continue to be itchy and may affect the fur growing back. I would take them both back into the vet, and the vet can discuss if they do have flea allergies and how to treat them. Tonight, give them baths in Epsom salts or oatmeal, as it may help temporarily with the itching. Tomorrow, I'd take them into the vet. Good luck, I hope this helps!
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