Apparently our cat, Sushi, likes butter. Mmmmmm, nothing like a few tablespoons of sweet creamery butter to cure those midnight munchies. She likes to eat and weighs 18 pounds (about 8 kg.) We've been working on helping her slim down for a couple of years now, but really gotten serious this summer. Perhaps the special diet cat food we got from the vet isn't her favorite. Guess I'm going to have to remember not to leave the butter out - otherwise I think we'll have a 20 pound cat!