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Why is my dog losing hair in patches? When should I see a vet?

Updated On September 23rd, 2025

Is it bad if my dogs hair is falling off

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Answered By Lauren Kennedy, DVM

Veterinarian

Published on October 17th, 2018

If it’s normal shedding, it’s totally ok. However, if your dog is losing hair in patches (which is what it looks like in your picture), then I would be concerned. Your dog probably has a skin infection likely from external parasites or an allergy. If there are several areas of missing hair and then I think it would be a good idea to take your dog to the vet and be checked out. Your dog may need some antibiotics and anti-itch medication to help clear things up.

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