N-Bone puppy teething rings are healthy dog treats that are a functional, edible and highly digestible dog treat for puppies. No nylon, plastic or rubber. Encourages exercise and satisfies your puppies need to chew. Helps reduce tartar and plaque, diminishes bad breath. These teething rings are specially formulated with DHA and calcium to give your furry young friend a healthy start. These teething rings are also designed to meet the specific chewing needs of puppies. The flexible and pliable design is perfect for puppy’s delicate gums and new teeth.