Fish, Bird, Mouse, Cat, Gulp!

Once a fish, a bird, a mouse and a cat lived together in a house.
Gulp!
Uh? I mean a fish, a bird and a slightly fatter cat lived together in a house.
Munch!
Um? Make that a fish and a much fatter cat lived together in a house.
Crunch!
Once a very fat cat lived in a house all alone.
Well anyway the cat was so fat that he couldn't get out of the tiny door of the house.
So he opened up his mouth and a fish jumped out, then a bird flew out and a mouse crawled out and, so angry were they at being eaten that they all kicked the now very thin cat out of the house and then fish, bird and mouse all lived there happily ever after.