Ours would simply pee their way out:

A basement remodeling project left Jany Chumas with one question after the drywalling was done where's Mary Poppins? Chumas' pet cat was nowhere to be found after the workers installed drywall in a room Jan. 2.

There's also this weird special food cocktail that Ellen mixes up for Cats that Won't Eat. When she brings it home the stuff acts like a giant cat magnet, they call come running. Ajax licks whatever surface the stuff has sat on long after it's been moved, and they all vulture around for hours wherever it happens to be. If they'd had that to put down in that basement, I bet that cat would've chewed its way through the drywall right quick.