Unleash the Flavor with Your Dog's New Giant Treat: Monster Bully. 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 is an XL collagen stick wrapped in bully. All the flavor dogs love for a XL long-lasting chew. Satisfy Their cravings with the XL Monster Bully - A chew that's large and tasty! | Redbarn Monster Bully Wrapped Collagen Stick Dog Treats | Size XL