Somewhere around the place I've got an unfinished short story about Schrodinger's Dog; it was mostly moaning about all the attention the cat was getting

You can't die with an unfinished book.

The Assassin moved quietly from roof to roof until he was well away from the excitement around the Watch House. His movements could be called cat-like, except that he did not stop to spray urine up against things.

Sooner or later we're all someone's dog

Everything starts somewhere, although many physicists disagree

In fact, the mere act of opening the box will determine the state of the
cat, although in this case there were three determinate states the cat
could be in: these being Alive, Dead, and Bloody Furious.