Nylabone Gumabones are recommended for teething puppies and senior dogs. They are strong, but made to be more flexible than the traditional Nylabone dog chew. Not for use with powerful chewers, each dog has its own chewing style and this bone is best for light to average chewers. Bristles raised during chewing will help clean teeth and prevent tartar build up. Not recommended for strong chewers. Made from inert soft thermoplastic polymer. Available in many sizes ranging from Petite to Souper.