I have had my 8 year old golden retriever on the Chondro Flex soft chews for only a few weeks, and I already see an improvement. His back hips were beginning to bother him...especially when he would get up from laying down. Now he not only is getting up with much more ease, but has more energy, wants to play and run more, and seems more like he did when he was a younger dog. Plus, he LOVES the taste of the chews. He gets so excited when he knows it is time for him to have them. I will definitely keep him on this product, and would recommend them to anyone that is looking for a product such as this.