I have a 14 year old X-race horse Quarter Horse gelding. We barrel race and ride nearly every day. This summer I got on him one day and he was definitely off and the following weeks I could see him getting worse. I tried x-rays and injections among other things none of which worked. My vet said to try Cosequin. Within a month and a half of getting on it he was back to perfect soundness. This stuff is amazing. I highly recommend it.
My older mare has been on cosequin for over 5 years. While it is not something to correct an obvious lameness, it works well to help bring that 'spring' back in her step. She enjoys working more and is not as stiff during her warm-up. Also, it is a small volume to feed so I don't have to try and mask it in a large amount of feed.To me, the high cost is offset in the fact that it does seem to work for my girl. It may not work for everyone but it is a much better deal than some of those products that don't really contain what they claim to do or have not been tested.