Well, I ran out and bought this at Petsmart. Always looking for ways to get my boys to drink lots of water! Not sure they really love it yet, but Buddy was hysterical to watch when he first found it. After one full day, I haven't had to add any water. My question is, for those of you who are using the FreshFlow fountain: do you leave it on all the time? When I finally got down to reading all the directions, it said not to leave it on unless "under direct supervision". That's not practical for me because where I have it plugged in is behind the refrigerator and not easy to get to. One real plus is that the cord is well hidden from Mike who loves to eat cords (coaxial is his best favorite!). I'm thinking of just leaving it on and keep a good eye on the water level. Any suggestions or warnings?