Clover's VERY prone to hiding things in seat cushions and behind the TV and really anywhere that she can try to hide things, but it's only every so often.

I don't think she's found that secret stairway though, but she doesn't have that many places to hide it around here.

Clover makes that sound too, but it's sort of a high pitched sound. I once was lucky enough to catch her and the other two dogs here in a talking yawn chain, proving once and for all, to me at least, that yawns are contagious, even among other species.