Well, obviously they need something of actual substance. But cat soups exist and are actually recommended like 3 times a week or so. I keep adding water to his foodbowl and he eats it up and drinks all the water usually, which is kind of like giving them a soup with meat chunks in it. He also has a seperate bowl for straight up water. One additional benefit from dunking it all in water, is it lasts longer, since wetfood tends to dry out really quickly.