Canine Naturals | Natural Beef & Bully Sticks. Canine Naturals Beef & Bully Chews are made from carefully sourced grass fed, free range cattle. These odor-free, long-lasting chews are best suited for heavy chewers and help remove plaque and tartar through chewing. With their great taste and collagen rich ingredients, Canine Naturals Beef & Bully chews are the healthy, safe, great tasting way to fulfill your dog's natural chewing instinct. Made with Real Bully Odour Free No Artificial Flavours, Colours, or Preservatives Long Lasting Rich in Naturally Occurring Collagen Suggested Size: Medium: 5" Large: 10"