Recommended for powerful chewers. Be sure to select the proper chew and size for your dog s particular chewing style. Bristles raised during chewing will help to clean the teeth and this cleaning action will help control plaque and tartar bui. Nylon, Liver Meal. Not Consumable. Only Small Shavings, No Larger Than The Size Of A Grain Of Rice, Can Pass Through Safely. Replace When Knuckles On Ends Have Been Worn Down. Non Toxic. Size: Petite. PETITE LIVER