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Why is my dog's belly turning darker? Is it normal or allergies?

Updated On September 23rd, 2025

Pet's info: Dog | West Highland White Terrier | Male | unneutered | 5 months and 3 days old | 12 lbs

My west highland terrier’s belly has recently starting turning a darker color. He doesn’t itch or seem irritated at all. Just wondering if this is normal or possibly allergies?

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2 Answers

Most Helpful Answer

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Answered By Dr. Dayna, DVM, CVA

Veterinarian, Certified Veterinary Acupuncturist

Published on March 16th, 2018

The pictures look like it could just be normal pigment change. As puppies mature their pigmentation can as well. If the skin is raised, thicker, crusty, or itchy then I would be concerned. If you have any concerns then I would encourage you to have him evaluated by your veterinarian. If there is a concern then a biopsy could easily be done at the time of his neuter. Best of luck and thank you for using Pet Coach.

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Other Answers

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    Answered By Laura Johnson VMD

    Veterinarian

    Published on July 23rd, 2017

    Hi, thanks for using Petco Pet Education Center, formerly Petcoach! I usually see the hyperpigmentation or darkening of the skin as a progressive sign of skin disease or allergies. These dogs are usually licking or scratching or have had episodes of skin infection. You didn't indicate how old Bailey but maybe if he is older you will see signs of allergies as the seasons pass. But some pigmentation can be normal. There isn't a website but you can sign up for a consultation and share photos.

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