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Why are my dogs itching and raw even with flea and tick treatment?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 2 years and 3 months old | 71 lbs

i have two dogs both approx 2 years in age.both are treated regularly for fleas and ticks with Sentry plus..The male was first to exibit skin problems on his tial head running along hi back approx8 inches.He rubs it raw almost on anything available.Now my bitch too has started showing sings of this as well however not as sever.i have 4 dogs total all large breed and all indoor.(yes its crowded in the bed)only these 2 show any problems at first just thought it was winter dryness .no change indiet

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Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on May 9th, 2019

This would be the most common area for flea allergies to manifest themselves. With flea allergies, all it takes is one bite from a flea to send the whole body into an itch cycle. Sentry Plus is a generic form of Frontline, which doesn't seem to work as well as some of the newer, prescription flea preventatives. I would recommend that you have the dogs evaluated by the vet to determine if it is flea allergies, or something else like food allergies, mites, or a bacterial infection. The vet may recommend a different flea preventative, anti-inflammatories, anti-itch medications, antibiotics, or medicated shampoos based on the health of the skin. https://www.petcoach.co/article/flea-allergy-dermatitis-or-flea-bite-hypersensitivity/

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