There was indeed an egg in the nest box. It was bigger than I expected. Unfortunately my toddler got ahold of it and dropped it, but only a little of the white leaked out so I fried the rest of it and fed it to her.

Last night I looked at my chicken thermometer and saw that it was 12 degrees in the coop. Somehow the radiator had been turned off. The red hen was sitting on the floor by herself and didn't look at all well, so I brought her in and stuck her in a box for the night. This morning when I went to put her back I found another egg, frozen solid and cracked open, stuck to the middle of the floor. Got to put some fake eggs in their nest boxes.