Canine Physiotherapy: How to Stretch your dog's hips - useful for hip dysplasia or arthritis 

This canine physiotherapy video explains how to stretch your dogs hips, which may be useful for dog's with conditions like hip dysplasia or osteoarthritis, or following injury or surgery such as a femoral head and neck excision (FHNE) to open up the range of motion in the hip joint, improve flexibility and prevent contractors (shortening of the muscles) from developing.
Manual techniques including passive range of motion and stretches, and also active techniques such as active range of motion exercises and use of cavaletti poles are demonstrated to ensure there is something that every patient can try.
It's always worth checking with your veterinary surgeon/ veterinary physiotherapist before starting any exercise program.