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Dog's stomach rash is blue/pink/purple after new food. Is it serious?

Updated on September 23rd, 2025

Pet's info: Dog | Mixed Breed Medium (23 - 60lb) | Male | neutered | 25 lbs

My dog's stomach is turning blue/pink/purple but it looks like a rash. We recently changed his food, too. He doesn't show any discomfort. What does it mean?

2 Answers

Most Helpful Answer

David Elbeze, DVM, MRCVS

Answered By David Elbeze, DVM, MRCVS

Veterinarian

Published on May 5th, 2018

This is probably due to a severe allergy, although it could also be fleas or mites.

First of all, in order to rule out skin parasites, you will need to treat Hunter with a high quality flea treatment (e.g. advantage), then get him to the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try discovering the cause of the allergy.

Some medications can be given by the vet in order to repair the skin lesions (steroids and antibiotics). simultaneously you should start him on a prescription hypoallergenic diet for at least 2 months.
Hopefully you will see some results after all this, if not you and your vet should consider putting him on a long term allergy treatment (Atopica or Apoquel).
Vote Icon2Pet Parents found this answer helpful

Related Answers from Veterinarians

  • Answered By David Elbeze, DVM, MRCVS

    Veterinarian

    Published on May 16th, 2017

    This is probably due to an allergy, although it could also be fleas or mites.

    First of all, in order to rule out skin parasites, you will need to treat Franklin with a high quality flea treatment (e.g. bravecto or advantage), then get him to the vet to perform a skin scrape - this might reveal an infection or a mite infestation. If all of those came back negative, the next step is to treat the allergy symptomatically and try discovering the cause of the allergy.

    Some medications can be given by the vet in order to repair the skin lesions (steroids and antibiotics). simultaneously you should start him on a prescription hypoallergenic diet for at least 2 months.
    Hopefully you will see some results after all this, if not you and your vet should consider putting him on a long term allergy treatment (Atopica or Apoquel).

    Vote Icon

    1Pet Parents found this answer helpful

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