BONE Gullet / Trachea – Cow gullets are an excellent natural source of chondroitin sulphate. They are solid cartilage surrounded by muscle meat. Chondroitin sulphate is an important structural component of cartilage and provides much of its resistance to compression. Chondroitin sulphate has become a widely used dietary supplement for treatment of osteoarthritis, and animals with joint issues. Make this part of your Brisbane Delivery of Raw Pet Food.