Quote from : Gone Girl Book

I could see the cat was definitely on the steps. Still on the steps, 20 minutes after Carl's call. This was strange; Amy loved the cat. The cat was declawed, the cat was never let outside, , because the cat ... was sweet, but extremely stupid. ... Amy knew she'd never see the cat again if he ever got out. The cat would waddle straight into the Mississippi River, "deedlie-dum," and float all the way to the Gulf of Mexico into the maw of a hungry bull shark. But it turned out, the cat wasn't even smart enough to get past the steps.