Nylabone is made from pure virgin nylon with baked-in flavour particles. A great tasting, high quality, gourmet health chew made from natural ingredients with no plastic, no added sugar or salt, & no artificial colour. The bones are annealed after moulding, resulting in a therapeutic chew device which is strong, safe & very durable. The bristle-like projections that are raised on the surface of the bone as it is chewed massage the surface of the teeth & gums & help to prevent plaque from forming. Available in 5 sizes, choose the largest size your dog can comfortably hold in his mouth in order to derive the greatest dental benefit. Ingredients: Wheat Starch, Glycerin, Cellulose, Lecithin, Potato Starch, Chicken Powder, Roast Beef Flavor, Natural Bacon Flavor, Natural Flavor, Oat Fiber, Calcium Carbonate, Soy Flour & Rosemary Oil. Vitamins: Thiamin, Riboflavin, Pantothenic Acid, Vitamin B-6, Folic Acid, Vitamin A, Vitamin E, Biotin, Choline, Inosito