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Will feeding my dog the same protein source long-term cause allergies?

Updated On September 23rd, 2025

Pet's info: Dog | Cavalier King Charles Spaniel | Female | spayed | 6 years and 4 months old | 17 lbs

Does feeding the same protein source long term cause food allergies in dogs? Why or why not? Please explain, thanks!

1 Answer

Most Helpful Answer

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Answered By Maria DVM

Veterinarian

Published on November 4th, 2018

Typically no. Actually, feeding the same protein source is best for your dog. If you continually change they can get gastrointestinal upset. It isn't very common for dogs to be allergic to food, although it can happen. Thank you for using Petco Pet Education Center, formerly Petcoach.

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