One of my critters got it.  My wife heard a rattling of a plate.  I was absented minded:  I laid down a slice of cheesecake in the living room and quickly went out to refill my birdseed and promptly forgot about the cheesecake.  We still don’t know who gobbled it down.  It was one of my critters.  One of my dogs.  I would not put it past anyone of them.  It became a tasty morsel for one of them.