Can Dogs Eat Soy? (Yes or No?)

Yes, in small amounts soy is not toxic to dogs. Soy is a common ingredient in commercial dog foods. As a primary protein source, however, it is not ideal: soy allergy is one of the most common food allergies in dogs, and soy can cause bloating and digestive problems.

What to Watch Out For

Raw soybeans and raw soy flour contain trypsin inhibitors that interfere with protein digestion. Only processed, heated soy (tofu, soy oil, cooked soybeans) is more digestible for dogs.

Soy contains phytoestrogens (isoflavones): with regular high consumption, these can affect hormone balance. Particular caution is needed with intact (unneutered) dogs.

Typical signs of soy intolerance: bloating, diarrhea, itching or skin problems after a soy-containing meal.

How to Feed Soy

Only as an occasional supplement, not as the main protein source. Plain tofu in small pieces is the easiest form to handle. No soy yogurt with added sugars, no seasoned soy products.

Nutritional Values and Dosage

100 g of cooked soybeans contain approximately 147 kcal, 12.4 g protein, 6.4 g fat and 4.2 g fiber. They also provide 197 mg calcium, 1.7 mg iron and 65 mg magnesium. Compared to beef (about 26 g protein per 100 g), the protein content is significantly lower, and the biological value is worse for dogs.

Guidelines by body weight (cooked soybeans, max. 2x per week):

• Small dog (up to 10 kg): 1 tablespoon
• Medium dog (10 to 25 kg): 2 tablespoons
• Large dog (over 25 kg): 3 tablespoons

For the first serving, start with half a portion and observe for 24 hours for bloating or skin reactions.

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