I purchased this for a senior Australian Cattle Dog (aka ACD aka blue heeler aka red heeler) and used one container and part of a second before starting him on a better quality dry kibble that contained most of the ingredients. He was a rescue dog of unknown age, and already had considerable arthritis in his spine, so it would likely have helped him more if he'd been getting it for a couple more years, but it certainly didn't hurt him, and I think did help some.