Sporn Durable Marrow Chew Bones are the chewable nylon bones with an edible "Jerky Flavor Down the Middle!" that your dog will love. The “marrow” is what makes the difference. Dogs are most attracted by scent and that's why the smell and taste of the marrow will keep your dog enticed. All Marrow items are non-toxic and regularly safety tested. Of course, you will have to keep a watch on them for safe chewing at all times. The perfect option to save your shoes and furniture and to keep your bored dog busy for hours. The Sporn Company are pioneers and industry leaders designing better products for dogs. Collectively our team has over 100 years of experience working with dogs. We are positive that our products can enhance your pet's chew time. Ingredients: Rice flour, pea flour, vegetable glycerin, calcium carbonate, dried brewers yeast, natural and artificial flavors (vegetable oil preserved with TBHQ), sugar, potassium sorbate (preservative), caramel.