The Purina Prime Bones Made in USA Facilities Limited Ingredient Medium Dog Treats are perfect for your furry friend. These antler-shaped, natural dog treats are made with real wild venison and have been enhanced with calcium to make them even more delicious. The extra-long-lasting dog treats help clean teeth and freshen breath and are limited in ingredients so they are free of corn, wheat, and soy. They are also free of artificial colors, flavors, and preservatives.