The Monster 12 Inch Bully Sticks come from South American Angus cows, some of the largest cows in the world. They are 20-40% larger than our Jumbo Bully Sticks. We recommend this chew for larger dogs but all sizes of dogs will love them. These bully sticks are quite simply, HUGE! Fully-digestible dog chew Sourced from free-range cattle Natural alternative to rawhide Our thickest chew, great for the most enthusiastic chewers! Customers say: Kai, my beautiful Vizsla, blisses out whenever he chews on one!