Ostrich Femur 12"Ingredients: Ostrich bone. Description: This extra large bone is about 12 inches long and super thick and heavy, with some natural variation in length and thickness, and individually shrinkwrapped. Our ostrich bones are wood smoked which provides an irresistible flavor that dogs love. Key Benefits: Unlike common protein sources like chicken or beef, many dogs haven't tried ostrich, making it a perfect choice for dogs with frustrating food allergies.