We had a Rhodesian Ridgeback that had hip dysplasia so bad he had to have a pectineal myotomy. Probaby didn't spell that right, anyway it is where they go in and cut the big muscle inside the leg to keep it from pulling the ball out of the socket on the hip joint. It worked fairly good for a while. Unlike humans they can also remove the ball off the femur and the hip joint will form a false joint with muscle that is supposed to be pretty effective.
