Pet Food Allergen

Soy Allergy in Dogs and Cats

Soy appears in pet food as soybean meal (protein source), soy flour, or soy hulls (fibre). It is more common in budget-tier kibble than in premium formulas. Soy oil rarely triggers the allergy because the offending protein fraction is largely absent — but whole soy and soybean meal do.

Prevalence

6-10% of food-allergic dogs react to soy (Mueller 2016).

Label names that contain soy

Any of these on an ingredient list means soy is present.

soysoybean mealsoy proteinsoy floursoy hullssoybean hullssoy protein isolatesoy protein concentratetextured vegetable protein

Ingredient pages

Soy

Symptoms that point to soy

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Factual reference based on AAFCO ingredient definitions, FDA guidance, and peer-reviewed veterinary literature cited above. Not medical or veterinary advice. Consult a veterinarian for decisions about your pet's diet.