Roo Tendons Manufactured by Loyalty Pet Treats Kangaroo Tendons (meaty) are a great natural teeth cleaner. They are a high protein, low fat, chewy gourmet treat suitable for dogs & cats. Manufactured by Loyalty Pet Treats. Kangaroo Roo Tendons are a great natural teeth cleaner. They are a high protein, low fat, chewy gourmet treat suitable for dogs & cats. We have the technology to do pure moisture extraction without cooking or air drying the end result is a real delicacy. Our treats are dried with our exclusive Nutrieseal® process. The Nutrieseal® process locks in the nutrition, flavour and aroma making them one of the most exciting pure healthy treats for your pet.