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My puppy bites leg, has hair loss, and looks infected. What's wrong?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | unneutered | 20 lbs

My puppy keeps biting his leg and has hair loss where he is biting. Also has hair loss around his left eye and nose. What could be wrong? It does look infected where he keeps biting. He is only 5 months old.

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1 Answer

Most Helpful Answer

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Answered By Ricardo Fernandez, DVM

Veterinarian, Veterinary Oncology Resident

Published on November 24th, 2018

Thanks for using Petco Pet Education Center, formerly Petcoach! This is likely either due to mites or allergies. I highly recommend that you have him evaluated by a veterinarian for further assessment and treatment. They would be able to diagnose this so that therapy can be started. Best of luck!

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