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My dog is biting a red, thinning patch on his back. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed Small (up to 22lb) | Male | unneutered | 8 years and 10 months old | 14 lbs

Hello, I have a Bichon Frise poodle, 8 years of age. He is a very happy and playful, energetic boy. As of last week, I noticed a small patch on his back. The patch is slightly redish-brown and the hair there looks a bit less dense than the rest of his coat. Today i saw him biting on it, however it doesnt seem to bother him too much or when i touch it. He is eating well, also going to the washroom well. He runs around and looks like nothing is bothering him. What can this be? Thank you, Tomek

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1 Answer

Most Helpful Answer

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Answered By Ana M, DVM

Veterinarian

Published on May 10th, 2018

Thank you for submitting your question regarding Bingo. It sounds like he is itching if he is biting his side. He could be experiencing seasonal allergies as those are a big source of itching in a dog this time of year. Be sure to check him over for fleas as well. Other causes of itching are a mild skin infection, an insect bite or sting or a small skin mass. I would start by bathing him with a moisturizing shampoo and conditioner such as an oatmeal or fatty acid based formula. If this does not relieve his symptoms, then he will need to see his veterinarian. I hope this information helps!

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