We have a very active 15-year-old Cairn Terrier who recently showed his first signs of arthritis in his hips -- so badly that it required Cortisone to give him relief. I ordered the Cosequin to see if it would help and to reduce the likelihood of more Cortisone. It's only been a week, but he's already showing improved mobility and a spring in his steps. We're back up to walking well over a mile a day. Very happy so far and absolutely stunned and delighted by the incredibly fast service and delivery by CPS.