Thanks Puddin Fluff. It's been a busy morning here with our last two abandoned eggs hatching.
You do have a mystery there. Hopefully your game camera will help solve it for you. I was thinking maybe a predator such as a raccoon but I don't think one would stop with eggs when there is a hen sitting there. You don't have another broody somewhere that could be stealing eggs from your sitting hen? I've heard of it being done.
Hope you find out what is going on and can stop the problem.
I've searched around the boxes and nothing found.
This is another reason I move all my broodies to private hatching pens---60+ hens in the last year or so alone---100's and 100's of eggs under them---never have a egg to go missing, rarely have a broke one. My hatching pens are wrapped with 1/2" hardware cloth---Nothing bigger than 1/2" can get into it(unless it digs under ground which has not happened). Works good for Me and them! I encourage everyone to get set-up so you do not have all these problems!! Good Luck in your Future Hatches!!
I am just hatching for fun and to let the broody do what she wants to do. If I were working on production hatches or selling chicks, I would separate. I had great hatches last year with this exact system and only one fatality due to hen squish because I didn't separate at hatch. (I do cage them a couple days before hatch is due just to protect the chicks.) I am just enjoying letting them do their natural thing. Just curious as to where the eggs are going.