Sweetcorn is an irresistible favourite of all things verminous, and I've never yet managed to get any to maturity, even though I still plant it (more in hope than expectation). It always, always ends up like this - scoffed by either rats or mice, or both, before it even gets ripe.
Now this is how the rest of my sweetcorn looks, a couple of weeks after the cats were let out of the shed:
I think it can be said that the cat as mousetrap experiment has worked. Outstandingly well.
(the cats are having a great time too... :D)