Harley had a couple of leg injuries and other problems which resulted in her gaining weight. With the extra weight and getting older, she then had joint problems. I used medicine that the Vet had through his office and thought it was a good product because it came from my vet. He had problems getting it in for me so I sought out a new reliable product. I found Liquid-Vet and the results have been fantastic. After a months use, Harley was more active and behaved like a younger dog. It was great to see!!