What is in Greenies® dental chews?
Source: Greenies Dental Chews

Gelatin, Wheat Protein Isolate, Glycerin, Soy Protein Isolate, Sodium Caseinate, Natural Poultry Flavor, Hydrogenated Starch Hydrolysate, Vegetable Oil (Preserved with Propyl Gallate), Sodium Tripolyphospate, Lecithin, Ground Flaxseed, Calcium Carbonate, Magnesium Monostearate, Monoglycerides of Edible Fatty Acids, Choline Chloride, Potassium Sorbate (A Preservative), Minerals (Magnesium Oxide, Zinc Sulfate, Ferrous Sulfate, Copper Sulfate, Maganese Sulfate, Potassium Iodide), Vitamins (dl-Alpha Tocopherol Acetate [source of vitamin E], Vitamin B12 Supplement, Calcium Pantothenate, Niacin Supplement, Vitamin A Supplement, Riboflavin Supplement, Vitamin D3 Supplement, Biotin, Pyridoxine Hydrochloride [Vitamin B6], Thiamine Mononitrate [Vitamin B1], Folic Acid), Chlorophyll.