These movements are PASSIVE and are performed preferably with your pet lying down, one joint at a time. Try and think of each joint as an individual “pivot” point with the other joints remaining static while the “pivot” joint is moving. Do not force flexion or extension of any joint as this could cause muscle/tendon injury; your pet will let you know what is comfortable.
PROM helps to promote joint integrity by moving the synovial fluid around within the joint, thus flushing out cartilage degrading enzymes. PROM also helps to stimulate mechanoreceptors on the joint capsule surface, helping to promote recovery from neurological injury.