Is my dog's back chewing after fleas & Trifexis due to allergies?

Question

Does she have some type of skin allergy or having an allergic reaction? She is constantly knawing on her back area. She had fleas when I brought her to the vet this month. We gave her Trifexis over 2 weeks ago. Pet's info: Dog | Mixed Breed | Female | spayed | 9 years and 4 months old | 32 lbs

Megan, DVM, CVA · Accepted Answer

Poor Pita! She could still be having a reaction to the fleas previously seen. I would try giving her Benadryl twice a day (see link below) and see if this helps. I would also put a cone collar on her to prevent her from chewing that area. Also, if you haven't already, I would also treat your house and yard for fleas because the fleas don't live on the pet but in the environment. Also, even though you gave trifexis, fleas don't die until they bite her so she could still be having new bites causing more reactions. I would continue the trifexis every 30 days. You can do a different flea preventative like frontline 2 weeks after the trifexis if needed. If her skin isn't improving, I would have your vet take a look at her. Your vet will be able to get her started on antibiotics if needed and stronger allergy meds. I hope this helps! https://www.petcoach.co/canigive/dog/benadryl/#

Is my dog's back chewing after fleas & Trifexis due to allergies?

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