Nylabone Dura Chew Wolf Bacon Flavored Hollow Stick Bone Dog Toy Durachew Toys Are Made To Be Long Lasting For Powerful Chewers Hollow Center Can Be Filled With Treats To Enhance Playtime Helps clean teeth and control plaque and tartar Provides Long-Lasting Entertainment; Fights Boredom Encourages Nondestructive Chewing Habits