Mine will only drink FRESH water, and I mean fresh. If I clean his bowl and refill it he'll come right and and take a long drink. But the next day, well by then it must be stale. He'll come out and rest his head on the edge of the bowl and look at it, then stare at me as if to say "Hey, this is unacceptable for a Royal beast like me". He also seems to prefer deer park spring water :/

He won't touch filtered tap water, so he gets the good stuff. What I buy for myself he shares. If I don't get deer park that week, then he is much less interested in drinking. He'll stare at it a while, touch it to his tongue, maybe take a short sip. If I do, there is no hesitation, he will drink as soon as I've put the bowl down. Luckily the cats are not as picky and must have lower standards - filtered tap water is fine with them


(I admit that I don't change his water every day, usually every other, and his royal highness just has to deal with it)