The best of two worlds in a single treat. Irresistibly tasty, this duo offers the benefits of collagen and the taste of bully. Supersized for the power chewer. Monster Bully Sticks® Bully Wrapped Collagen is an XL collagen stick wrapped in bully. All the flavor dogs love for an XL long-lasting chew. Satisfy their cravings with the XL Monster Bully Sticks® Bully Wrapped Collagen – A chew that's large and tasty!