That thought occurred to me, but we were in the living room most of the time (I had gone out there earlier), and we probably would have seen the door open and close, also, the dogs would have had a frenzy.
I think maybe my friends mini lop doe (that I'm borrowing to breed for them) actually was pregnant and she kindled somewhere in there (unbeknownst to anybody) and they came out of the nest. The little Charlie doe has the same color as the buck I had bred the doe to, the one I sent on a dinner date with a friend after he bit me. Funny thing though, we cuddled the bunnies in the house until not too long ago and they seemed like we've been handling them since they were born. But there is a Charlie, which means the buck WAS a broken pointed white.