Meat grinder. Rotten.com has three more in the series, and they get progressively worse, especially as the methods they use to cut the metal off are rather, um, destructive to flesh...
The best kitty voice EVER is in MST3K the movie, when the scientist is kindly giving the cat a bowl of milk, and the cat kind of shies away from it but he shoves it in front of his nose, and Tom Servo is like "NOO...PLEEEEZE....I CAN'T DIGEST MILK--GGHLGLGG!"