I have to say that after just 6 weeks of using this product, I see a difference in my 22 year old arthritic quarterhorse, Beans. Before, when we went up to feed, we had to wait on him to slowly walk up to the feeding area before we set out the feed so that our other horse would not eat his and then steal Beans' food. I asked my daughter if she had seen a difference and she said, come up with me to feed and see for yourself. She called them when we got to the barn and he actually trotted around the corner. I haven't seen him trot in a couple of years! I immediately ordered 2 more jars.