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. I will soon try the Equitonic on him. This is a great product.