This is a must-have for any senior or active dog. My 10 year old girl is still running around like a puppy. Bought this larger size and give her 1/2 tablet daily (she is 40#) and it seems to be working well. She was not showing any signs of slowing down or of arthritis prior to starting her on this supplement, but I wanted to be proactive in her older age. So far, no signs of slowing down, limping, stiffness, etc. This could be attributed to good diet as well as her fish oil I also feed her daily. I recently started giving this to my 1 1/2 year old as well, as she is very active and competes in agility.
I am an RVT and recommend this to all of our clients with senior pets.