My dog is 15 now. A couple of years ago, we started noticing that she was not getting up in the bed with us anymore like she used to, and she was walking kind of stiff. Glucosamine Chondroitin was helping us, so we thought it might help her too. We just get the Walmart brand. You can find it in the pet section. We have ordered it online and also bought it in the store. It's not terribly expensive. But after a week or two, she returned to her habit of jumping up in the chair, next to the bed, and then jumping on the bed. She moves freer and easier now, too. It seems to be helping her and she's definately worth it!