I had a vet tell me many years ago to salt my cat's food to get him to drink more water - but I would definitely check with your vet first. Also, many cats have the peculiar quirk of not liking to drink water out of a bowl that is close to their food bowl. Troy's suggestion would work - try different places and containers to see what they like best. I have usually kept a bowl in the bathroom, but the cats I have now walk past it to the big white porcelain bowl next to it - so I abandoned that idea and just let them slurp out of the toidy. You'd be surprised how much water a healthy cat does drink when you find what their quirks are and accomodate them.