Warning: Boneboos NON-EDIBLE CHEWS are made with polypropylene. They are NOT intended for consumption. During normal chewing, tiny bristle-like projections are raised that help clean teeth. If these tiny pieces (no larger than a small grain of rice) are ingested, they should pass through. A dog should not be able to break off larger pieces of any Boneboos Non-edible Chew. If you think that your dog swallowed a large piece of a Non-edible Chew, take the chew away and contact your veterinarian for advice. No dog toy or chew is totally indestructible. Frequently inspect any chew before giving it to your dog to make sure it's whole and intact, with no missing pieces. Replace a Non-Edible Chew when ends are worn down, or if it becomes too small to chew safely.