We have had our Cavalier, Lady (age 13), on Bone and Joint for a couple of months. She has monthly injections and we also had her on another supplement for joints so while we were keen to swap to Bone and Joint and give it a try we did not go in expecting much in the way of changes. Well let me tell you it took about a month but we have definitely noticed positive changes, Lady is able to get up from lying down and cope with stairs much easier. We have already told our vet about this product and been recommending to our friends with older dogs.