Petco Text Logo
Petco Pet Logo

Why is my allergic dog suddenly biting tail, licking bum, and itching?

Updated On September 23rd, 2025

Pet's info: Dog | Cockapoo | Female | spayed | 1 year and 3 months old | 23.2 lbs

My dog has a history of allergies (seasonal and chicken). This new allergy symptom has just started where she continues to bite her tail/rip hair out and lick her bum. She has been on allergy medication/injections(Apoquel and Cytopoint) before and she’s currently on Hills brand z/d salmon and potato kibble. Her anal glands were just expressed a couple weeks ago. She takes Bravecto as well. What could this possibly be as her itching and biting herself has progressed and nothing seems to help.

1 Answer

Most Helpful Answer

Image profile

Answered By Jenna Beyer, DVM, MBA, cVMA

Veterinarian, Certified Veterinary Acupuncturist

Published on May 5th, 2019

It sounds like your vet has established a complete treatment plan for Honey. It is odd that these new symptoms have appeared. Bacterial infection, mites, or nerve disorders could cause this behavior. I would recommend that you have Honey re-evaluated by her vet to determine what could be the cause for this new behavior, since they are most familiar with her individual case.

Vote icon

1Pet Parents found this answer helpful

image
Have A Vet Question?

Book an appointment with the pros – our expert vets are here to help.

Sponsored