Natural, Grain-Free Dental Chew for Fresh Breath on Every Adventure. Every adventure is more fun when it includes special moments of closeness with your dog. Make sure those moments are enjoyable for both of you by fighting doggy breath the natural way with Zuke's Z-Bone Dental Chews. Made with an ideal texture to gently clean your dog's teeth, each highly digestible Z-Bone is specially crafted in the USA using the Earth's best ingredients — like apples and carrots — and NO wheat, corn, soy or gluten. It's a delicious way to support your dog's clean teeth and fresh breath so they can continue to enjoy every adventure you share. Choose from three sizes based on your dog's weight: Mini (10-25 lbs), Regular (25-60 lbs) and Large (60+ lbs). Z-Bones are not suitable for puppies or dogs weighing less than 10 pounds.