Nylabone Puppy Teething Keys is specifically designed for young puppies to aid in the growth and development of their teeth and jaws...and to encourage safe and non-destructive chewing. During normal chewing, small bristle-like projections will be raised on the keys which help clean teeth and massage gums. This is not a consumable product but small shavings (no larger than a grain of rice) should pass through without effect. This product should not be used by a dog with any of its adult teeth. Nylabone Puppy Teething Keys - Chew Toys