Marrowbones are tough, chewable nylon bones with a vegetarian 'Jerky' flavour running down the centre which motivates dogs to chew. They are extremely durable and will provide hours of enjoyment and chewing satisfaction! Marrowbones are also good for dental hygiene; nylon shavings raised during the chewing process act like a toothbrush, removing tartar and cleaning the dog's teeth. As with all toys and treats, it is important to supervise their use.