WellnessWHIMZEES® Brushzees Dog Dental Treats

The familiar white potato, used as a carbohydrate source in many grain-free foods. Potato starch binds kibble; potato protein is a concentrated plant protein that lifts the protein figure on the bag. Cooked potato is safe and well digested. Grain-free foods built on potatoes and legumes were part of the FDA's 2018 to 2022 look at diet-associated heart disease in dogs, which did not establish a cause; the agency has not asked for any to be withdrawn.

The dried cells of yeast, often a by-product of brewing. It is rich in B vitamins, protein and minerals, improves flavor, and contains compounds that may support gut bacteria. Despite a persistent myth, there is no evidence it repels fleas. Yeast is an uncommon allergen in pets. Yeast culture is a slightly different product, a fermented feed that supplies similar nutrients.

A legume plant, the same one fed to horses, dried and added as a source of fiber, vitamins and chlorophyll. It appears in small amounts and gives kibble a greenish fleck. Alfalfa is safe for dogs and cats at these levels. The protein it contains is small and poorly digested by carnivores, so it adds little nutrition.