My trail horse Chester is around 20 years old and is starting to become stiff. We ride anywhere from 10 to 15 miles and he is able to keep up with the other horses and is doing fine, I just want to know that I'm doing everything I can to keep him healthy and pain free. Is there any supplements that you know of I should be giving him that would help? I've heard Cetyl M joint formula works quite well but is quite expensive for a 16 year old's paycheck. Thanks for the help.