Beef Trachea chews, sometimes referred to as "moo-tubes" or "windies," are a hollow dog chew. Trachea are high in both chondroitin and glucosamine. These naturally occurring agents have both been proven as effective in promoting healthy joints in dogs. Give them a try at Best Bully Sticks, and we are sure that you won't be disappointed! Feeding Guidelines: Feed your dog one a day for a healthy and entertaining chew. Storage Instructions: Keep in a sealed bag or container between chews.