Canadian Brand. Beef with Pumpkin Stuffed Chewbies are trimmed beef trachea filled with Rollover's Beef with Pumpkin filling and baked to be a healthy treat. These are high in naturally occurring glucosamine and chondroitin and with the added benefits of pumpkin (aid to digestion, rich in nutrients and can help digestion), these treats are an awesome 'Good Dog!' treat.