Canadian Brand. Open Range Water Buffalo Collagen Bully Sticks are single-source protein treats that provide essential nutrients, vitamins, and minerals. They are also very high in chondroitin and glucosamine, which help to reduce inflammation in the joints and support healthy skin and a beautiful coat. This fantastic chew treat helps to reduce plaque and tartar, contributing to healthy teeth and gums. As with all chews, these Collagen sticks help to reduce boredom and will help keep your dog mentally stimulated and happy!