"This is the best purchase I've ever made. I bought a beautiful quarterhorse who was doomed because of arthritis in his back hocks. Only 7 years old, but all of the sudden nobody wanted him. My vet advised I not buy him. Said he should be unshod, put to pasture for at least 6 months, then re-evaluated to see if his hocks had self fused. They gave me the disk with his x-rays on it. This is the first and only horse I've ever owned. I bought him anyway, researched my options, and started him on Cosequin optimized with MSM. He was more comfortable in a matter of weeks. I then rode him, gently, no jumps, and loved him, and made sure he had the correct amount of cosequin in his feed bags everyday. After a year and a half I decided to get him re-x-ray'd to see how things were going. The vet first flexed him, which went surprisingly well, then reviewed the prior x-rays. We discussed injections and so forth. Then we did the new x-rays. He is well! No other way to put it! The vet was dumbstruck. The space is there, the gaps are gone, and he is an awesome, valuable, ready to get in tip top shape horse! He will always be my baby, but I feel vindicated to say the least! I'm now known as the horse nurturer at the barn, instead of that crazy woman who doesn't know what she is doing. I'm keeping him on the Cosequin forever, but want to say to everybody out there with a horse you love who is suffering from arthritis - try this stuff! It takes some patience and some discipline, but you will be amazed at the results."