I was very happy to receive the Equitonic 9.  I have an old break of my tibia which did not heal straight along with multiple fractures on the head of the tibia.  I recently suffered an injury to the femur on the same leg.  The temporary lack of use of my knee caused the arthritis to escalate and increased the pain.  After a long treatment with the Equitonic, the pain subsided to pre-injury levels,  or better and the mobility increased.  I also have a Missouri Foxtrotter who has been cocking his hind fetlocks, particularly his left one.  I’m suspecting arthritis is developing and the Equitonic is working great on him too.  This is a wonderful product!