Here is how Toby "the cat" lets Caleb "the Kitty Feeder" know that he is out of water :-) He will actually lounge over the bowl, in the bowl... whatever it takes to draw attention to the bowl.... but, ya know- it isn't because Caleb doesn't put water in there every day.... if Lady "the dog that drinks a lake every day" would slow down on the drinking a bit.... Toby may have more- water more often!!