I bought this 2 weeks ago, I needed something for my 9 year old dog that has bad legs. We have used many medications from the vet, but they are just painkillers which makes my dog very drowsy. In addition, the painkillers only lasted for a short length of time and usually before he could take the next dose. Now, I'm not claiming that this product has cured my dog, but his mobility has significatly improved. I highly recommend to any pet owner that has a pet with joint pain. Joint pain can decrease the quality of life for our fur friends. As with any supplement, it will not work the same for all dogs. It will help some dogs while doing nothing for others! I am happy to say that it worked for us! My dog can run around again and enjoy life!