Hartz Chew 'n Clean Tuff Bone, Dental Dog Chew Toy, Medium, Color May Vary (Pack Of 1) Hartz Chew ‘n Clean Tuff Bone satisfies your dog's natural desire to chew. These durable chew toys are textured with nubs that gently massage and exercise your dog's gums, keep teeth clean, and support overall better dental hygiene. These chew toys have a bacon scent to entice your dog to chew while promoting those dental benefits. Chew ‘n Clean Tuff Bones are perfect for puppies teething and mild to moderate chewing for adult dogs. Chew ‘n Clean Tuff Bones are available in a range of different sizes to fit every dog's chewing needs!