Some flours are derived from foods that may cause allergies, such as soy, wheat and corn. Avoid fragmented flours like potato product, middlings or unspecified flours, along with those not fit for human consumption. Check to make sure any canine food you give your dog doesn’t contain wheat, corn, rye, almond, amaranth, barley, chickpea, buckwheat, farina, millet, oat, pumpernickel, quinoa, rice, semolina, sorghum, soy, spelt, tapioca, or teff flour products.