I am a BIG fan of Tight Joints Plus! It is a great product that won't break the bank and WORKS. I use it on my two performance horses as maintenance and my 6yr old has a hock fusing and I don't want to inject him that young. After feeding double dose for the first 2 weeks I noticed a HUGE difference. And my other gelding is great as well.
There are some great testimonials on the site along with the info on the product. Equine Joint Supplements | Auburn, WA