DGP is working great on my old black lab. He has some problems with his right hip and right rear leg, (not sure how old he is as he is a rescue), but DGP is helping him so much. He wants to take a walk most nights now, as well as in the mornings. He had given up his night walks, I believe, due to pain and stumbling more in the darkness. I ordered some last year to try and help my 9 year old border collie, but never got to use it very long on her before we had to put her down. I am thankful for this as I now have 4 big old dogs who will benefit.