Hypoallergenic Diets for Dogs: A Clear Guide

October 20, 2025

Dog food allergies are commonly diagnosed but often misidentified. A dog with loose stools, itchy skin, or recurrent ear infections isn't necessarily allergic to their food — but diet can absolutely be a contributing factor, and ruling it out properly requires a specific process.

True Allergy vs. Intolerance vs. Sensitivity

A true food allergy involves an immune system response to a specific protein antigen. Food intolerance is a non-immune digestive reaction (like lactose intolerance). Food sensitivity is a broader, less defined term. All three can cause symptoms, but true allergies and intolerances are what we're actually diagnosing in most dogs.

The Most Common Food Allergens in Dogs

The Elimination Trial

The only reliable diagnostic method: feed a novel protein (one the dog has never eaten) exclusively for 8–12 weeks, with zero treats, flavourings, or supplements. Then reintroduce one ingredient at a time. If symptoms return, you've found your allergen.

Good novel protein options: venison, kangaroo, rabbit, duck, or fish — depending on what your dog has previously eaten.


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