Cats have descended from their African desert-dweller Felis sylvestris lybica (the African wildcat) and have adapted to a dryer environment. In the wild the cat eats food with high water content such as; mice and this delivers the majority of its water.
Our companion cats are very close to their wild ancestors in terms of behaviour and are not very good at drinking water. By paying attention how cats naturally eat and drink; owners can significantly decrease dehydration and reduce stress.
To learn how to encourage your cat to drink water head to THE IMPORTANCE OF DRINKING WATER FOR CATS! article on ACL.