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When will my pet's lost hair regrow after successful flea treatment?

Updated On September 23rd, 2025

Pet's info: Dog | Labrador Retriever | Female | 2 months and 30 days old

After cleaning fleas in how many day days the lost hair come back

3 Answers

Most Helpful Answer

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Answered By Dr. Massimo Orioles, DVM, Cert AVP, MRCVS

Veterinarian

Published on April 27th, 2017

It can take anything between 2 weeks and a month time, depending on the severity of the hair loss and the amount of skin inflammation. Please do not hesitate to contact us again on the forum or by requesting a consultation if you have any more questions or to discuss it any further.

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    Answered By Ricardo Fernandez, DVM

    Veterinarian, Veterinary Oncology Resident

    Published on August 25th, 2018

    Thanks for using Petco Pet Education Center, formerly Petcoach! Generally, if the correct allergy is being treated, it may take a few weeks for the hair to start coming back. If there is no improvement within 1-2 months, I would assume it may be due to a different kind of allergy such as to the food or environment. Good luck and have a good night!

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    Answered By Ana M, DVM

    Veterinarian

    Published on April 21st, 2018

    Thank you for submitting your question. It is possible their skin issues are still related to the fleas. Be sure to vacuum daily and wash all of their bedding in hot water frequently. They need to be on a veterinary grade flea and tick prevention. Bathe them weekly with a moisturizing shampoo and conditioner such as an oatmeal or fatty acid based formula. If the skin issue does not resolve, then they will need to see a veterinarian for further testing. I hope this information helps!

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