My cats love love this
"My cats love love this vibration ball, of course on the lowest speed one is very senior with severe arthritis in the hind legs and thin fur. The other is middle-aged with extremely thick for both of these cats. Let me put the ball on the tummies, the head hind legs spine, just no face and no paws. If I call out ball time they both come running and afterwards they sleep like babies and their eyes are glazed over for me. The ball has been extremely therapeutic."
