My cat has been having UTI problems and my vet took a urine sample, and since it came up w/no bacteria, diagnosed her with feline urologic(sp?) syndrome? Her cramps seem to have gone, and she is not peeing near as much as she was, and NO blood, so...Anyway, since I switched her food she has been having diarreha more so than not and I'm worried about her getting dehydrated. I've been putting a little bit of canned tuna water in her water bowl to try to get her to drink more, but I'm still afraid she might not be getting enough. I bought canned food too and she just doesn't like it.(She's never liked anything but dry...I know, WEIRDO!) Anybody have any other ideas?? How much water should a cat that only eats dry food drink, say, in cups, in a day?