I used to supplement my older girl with Gluticosimine and chrondroitin(spelling?),I started her around 7 years and I really think it helped keep the arthritis at bay. I know several people that swear by this for themselves and all sorts of animals. Although my one girlfriend that used it for her dogs said when the arthritis got too bad, that wouldnt help anymore.Yet I know a guy that got a lame horse he gave this too and Msn and said after a couple weeks the horse was good as new! Good Luck.