Do you have a service dog? We have a K-9 Callus Cuff for you too! The Service Dog K-9 Callus Cuff comes with a service dog working patch. Calluses, Hygromas and Pressure Sores happen to dogs of all sizes but especially large breed and giant breed dogs. Padding on the elbow will help heal and relieve pressure on the joints when lying down. Sizing Chart Sizing Video *Color shades may vary