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My dog still itches after 5 days on new allergy food. Is this normal?

Updated On September 23rd, 2025

Pet's info: Dog | Mixed Breed | Male | neutered | 2 years old | 97 lbs

My dog has really bad allergies. We went to the vet & decided to do trials with food to see what helps. I bought him a new dog food & about a week later you could tell he was worse, he was itching more, ear infections, rashes, he was allergic to this food. So I switched him to a new food & its been about 5 days with this new food but he still is itching & has pink between his toes & no hair growth. Is this normal? Could he still be reacting to the old food? When should I switch his food again?

1 Answer

Most Helpful Answer

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Answered By Jessica Desrosiers

Veterinary Technician

Published on July 7th, 2019

It can sometimes take up to two months to fully see results of a new food before any symptoms are completely gone if it is a food-based reaction. I would hesitate to keep switching foods as you won't be able to accurately judge if a food is causing it and may just cause added GI upset on top of the itching and scratching. If Jax is still breaking out very badly it would be best to contact the vet doing the food trial with you so they can take note and make suggestions on whether a change should happen or if you should stay on the food for a while longer.

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