One of my older cats has been experiencing pains in her hips and back since falling downstairs a couple of years ago. She suffers badly in the cold but since putting her on this (plus a quality fish oil) I've noticed a marked improvement. No more sudden growling or hissing when pain strikes, and she limps far less. She now sleeps in a relaxed and comfortable position at night and can stretch without pain. I only give it once a day - but am certain that this is responsible for her improvement as I've tried so many other things and nothing has helped before.