We've had two cat fountains, pretty much from day one, and I don't get any trouble with water play, despite the fact that both mine are fascinated with water - seems to be limited to watching though. Having said that, last summer Freyja quite liked flicking water from the Drinkwell Platinum's tap, all over the kitchen floor. And Wicca seems to like to dunk her stupidly bushy tail in the reservoir. Freyja loves to get up on the kitchen sink if the tap is running and if she's not let into the bathroom when the shower's on she'll wake the whole of Reigate (at 4.30 in the morning!).