That's possible. I had a Siamese cat that used to steal things and hide them. I was working on a circuit project for work and ran out of parts. As I was looking around for them, I saw my cat take one of the plastic bags and tuck it under the couch. When I looked further, there were a bunch of bags with resistors and other components I couldn't find!Hmmmm...... With two cats maybe that is why our thousand piece jigsaw puzzles are always missing a piece when we get done....
My suggestion is to check under your couch. Who knows what might be tucked away.