Headless shrews are always popular. No, not a thing. You might think you can, but that is because you've misunderstood what is going on. You think it's the cat turning up obediently at the back door at ten o'clock for its dinner. From he cat's point, a blob on legs has been trained to take a tin out of the fridge every night.
Punishment has no effect on Real cats.
This is because Real cats don't associate the punishment with the crime. As far as they're concerned, shouting, slippers on a low trajectory and being talked to in a loud, patient voice are all manifestations of the general weirdness of the blobs. It consists simply of persistently being on the wrong side of a door, and goes on for as long as human tolerance will stand and then a bit longer. Everyone's heard of Erwin Schrodinger's famous thought experiment. You put a cat in a box with a bottle of poison, which many people would suggest is about as far as you need to go.