This fountain to her small size. It's a good thing, because in general, this kind of product is rather cumbersome. But: - The flow orifice is misplaced: one finds water permanently grounded. By drinking the cat makes a mess. - The noise of the pump is appalling. It even happens that vibrates.
In short, Drinkwell is not super reliable. Between my previous two fountains that have not held a year and this including design flaws are unacceptable, he'll have to start looking for the ideal fountain.