I've long wondered why the Termite Terrace crowd tortured Sylvester so much. In "Canned Feud", his owners go on vacation and leave him locked in the house. He has plenty of cans of tuna, but a nasty little mouse keeps holding the can opener out of reach, forcing Sylvester to come up with all sorts of unpleasant gags to try and get it.
So why would a mouse want to be a sadist? Your guess is as good as mine. Of course, these cartoons were chock-full of sadists (or at least characters with a New York side): Bugs Bunny, Road Runner, even Tweety himself. If nothing else, it goes to show that these cartoons weren't really intended for children; they were created to get shown before feature films in the cinema.
Anyway, it's not a bad cartoon, but I've seen better.