For large - giant breeds. Average 10” long and larger - a heavier antler for large breed veracious chewers and giant breeds. Split Antlers are cut straight down the middle exposing the marrow for pups that are not super aggressive chewers. This make the experience softer on their teeth and gums while being easier to access the marrow. Whole antlers are just that - round with the hard outer layer intact. These are great for super chewers. Some antlers may still have velvet - don’t be alarmed some dogs think that's the bombdiggity! If not, it can be easily removed for them.