StarMark Everlasting Treat for Dogs Long Lasting: Dental Chews That Are Hard Like A Bone To Help Keep Your Dog'S Teeth Clean. Pair Them With The Starmark Everlasting Treat Toys For Challenging Chewing Fun. Chews Like A Real Bone: Features A Unique Shape That Your Dog Can Lick, Chew Or Gnaw. Challenging Design: Use With Starmark Everlasting Puzzles To Create Hours Of Mental &amp; Physical Stimulation. Helps Clean Teeth: Special Dental Ridges And Chew Action Help Remove Tartar. Multiple Flavors And Sizes: Chicken, Liver, Hickory, Vanilla Mint, Wheat / Corn / Soy Free, And Wheat Free Flavors (2 Treats Per Pack). Small (Under 15 Lbs), Medium (Under 40 Lbs), Large (Over 40 Lbs).