She is twitching in her sleep, making little odd guttural "kah kah kah" noises. Her hind legs, they seem to want to be running.
What do cats dream of? Is she chasing the great white bird of tasty magic? Is the delicious feesh just so close in her brain she can taste it and must vocalize her near victory?
I always wonder. And I always marvel a little at our deep similarities.