Beef Trachea chews, sometimes referred to as "moo-tubes" or "windies," are a customer favorite. They are a hollow chew that last a long time. 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!