The number one ingredient in your dogs treat is importantwhich is why Barkworthies Collagen Sticks are made up of 95 collagen making them good for your dog inside and out Collagen supports your puppy pals healthy skin and coat promotes mobility and flexibility and can help ease joint pain and stiffness Bonus They are long lasting and will help keep your dog busy for hours Features . Collagen Grain Beff Peanut Butter Dog Stick. Case of 25 Ingredients . Beef Collagen Beef Vegetable Glycerin Natural Peanut Butter Flavor Specifications . Size 12 in . Flavor Peanut Butter