100% natural and edible Icelandic+ Lamb Horn Marrow Dog Treats are single ingredient and contain no additives, preservatives or supplements. They come only from the pure lands of Iceland and are ethically harvested as part of the local food source of Icelanders. Not only are they delicious for your dog, they reduce tartar and plaque build-up for healthier gums and teeth. They are also a great natural source of calcium that promotes strong bones and healthy hair for your pet. Icelandic+ lamb products are cleaned and air-dried within FDA, USDA, EU, and MAST standards and regulations.