Promising review: "I have a large 120-pound Anatolian shepherd who loves to chew, and this is probably her favorite toy. This will last a week or two before it is reduced to a little nub, at which point I remove it from the rotation of toys she chews. Never allow the dog to have it once it is too small, as then it is a choking hazard. The Dogwood toy is made to slowly sort of crumble, so only little flakes come off, and I like that because it never produces slivers which are dangerous. I am sure the dog ingests some of the material, but it is small, non-toxic, and passable. My dog has chewed these since she was a puppy, going through many of these, and she has never gotten ill or vomited. However, if you are concerned about some of the reviews which state that this product is dangerous, please talk to your veterinarian about your dog specifically." —Fluffpuppypup
Get it from Amazon for $9.56+ (available in four sizes).