There’s an opening to the hollow core right on the floor on the side of my bed. In the morning when I get up I carefully put both feet on the side of the bed and jump out a little so as not to fall into the hole. So far it has worked and the hole has not gotten any bigger but I notice it disappears after I successfully make the jump and look back.
Do you suppose the opening is opportunistic? I have noticed socks missing every once in a while.
You better consult the expert on that one.
It can't be K (she's too independent), and there's no way you pick up your own dirty socks, so it must be the dog.
Check under the bed.
(No...don't....monsters live under beds.)