Herr Schrödinger's famous feline was Not killed by the vial of poison! However, since neither food nor water was left for The Cat during The Experiment, and such a long time has passed, the poor kitty has died of neglect. Also, sadly, no litter box was included in The Box. The mess resulting from the dead and decayed cat with no litter box was deemed too disgusting to photograph (and the smell! We couldn't even get close enough to take a photo!)
So, Rest In Peace, Original Schrödinger's Cat. You will not be forgotten, as you have given us new data with which to refine the original experiment.