The Achilles tendon is a tough band of fibrous tissue that connects the calf muscles to the heel bone. It is a tough and long-lasting treat. It is a great boneless treat for dogs of all sizes. As they are so tough, they are great for teeth cleaning. You can expect a little mess when eaten, so better served outside. Toughness rating (1 – 3, with 3 being the toughest): 3 Please note that the toughness rating is a comparison of this treat against other treats. All our beef is grown in Australia. Available as a single item or in packs of 3. As all our treats are 100% natural products, you can expect slight variations from the product pictured.