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My dog is losing hair on his head and back. What could it be?

Updated On September 23rd, 2025

Pet's info: Dog | Yorkshire Terrier | Male | unneutered | 4 years and 5 months old | 5 lbs

Mello lost hair on his head and down his back whats wrong

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on April 27th, 2018

Hi there! There are quite a few things that can cause hair loss in dogs, so it's hard to say what might be wrong without being able to examine Mello and do some testing. Some common possibilities would include allergies, fleas, a bacterial or fungal skin infection, or skin mites (mange). Treatment will depend on what the underlying problem is, so it's important to get a diagnosis first. Because of this, I would recommend taking Mello to the vet for an exam when you are able to. He/she can do some simple skin tests to help diagnose the problem and get him started on appropriate medication to treat it depending on what is found.

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