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My dog has diarrhea and itchiness. Should I try a limited ingredient diet?

Updated On September 23rd, 2025

Pet's info: Dog | Poodle | Female | unspayed | 5 months and 1 day old | 25 lbs

How do I know if my dog has a food allergy or intolerance? She gets diarrhea kind of frequently. There’s different amounts of time in between each episode, and sometimes I feel like it’s definitely garbage gut. However she also seems itchy, so I can’t rule out something else. Is there harm in switching to a limited ingredient diet?

1 Answer

Most Helpful Answer

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Answered By Jennifer Summerfield, DVM CPDT-KA

Veterinarian, Certified Dog Trainer

Published on June 28th, 2019

Hi there. It does sound possible that Birdie could have some type of food allergy or intolerance. In general, there is no harm in switching to a hypoallergenic diet to see if this helps - this is really the "test" for food allergies, since we don't have a reliable way to diagnose them through lab work. I would recommend using a prescription hypoallergenic diet such as Purina HA or Royal Canin HP to ensure a reliable result.

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