Canadian Brand. K9 Choice Beef Marrow Bones (3-4 inches in size) are a great way to add variety and enrichment to your dog's routine. These edible bones encourage longer mealtimes your pet will work harder for, helping support calcium and mineral intake while also providing a beneficial mental workout. Always supervise your dog to understand their chewing style, as some may be overly aggressive or try to gulp bones, which can cause choking. Never feed cooked bones, as cooking makes them brittle and prone to splintering and injury.