Hi, My first real, dedicated broody hen is Petunia, a Cuckoo Marans. I got some mixed breed eggs for free, locally, and put four under her on the fifth of this month. We left her staying in the top of the tractor (a nest box with a lip and a specially trimmed board that we would put in front of her, to block her from sight) and just removed the board during the day. On the 15th of the month, she jumped down out of the nest box when I was in the backyard, and was sounding the egg song/alarm call. I went over to check her eggs and one of them was missing. On closer inspection, something had created a groove about 3-4 inches wide, and shallow, under the hardware cloth skirting, and for a short distance into the tractor (maybe about 10 inches or so). This was the only evidence that I had that something had happened. There was absolutely no shell or area with yolk, etc. (hurts my feelings as we candled the night before, and there were live little embryos flipping around in there!) We made a decision to remove Petunia and her three remaining eggs (I had been worried about breaking her broodiness) and put them in one of the nest boxes of the new coop. I told my husband that the large door over the boxes should be locked, but he said they were fine with the double carabiner setup we have. I also told him that there was an approximately 3/4 inch gap alongside one of the windows---we are still in somewhat of a construction mode---and he said it's okay, nothing is coming through there. I said, "but. . . ", but in fact we did leave it that way. On the 16th, another egg---the Turken egg---was missing. No evidence of anything anywhere---no shell or yolk stain, etc., and no harm to any birds, either, but only two eggs left. I raised a fuss, and my husband stuffed the crack along the window with insulation, very tightly, and padlocked the doors. Still two eggs under her today. What would have taken those eggs from under her without harming her, and without leaving any evidence? Anyone have any ideas? I have a few of my own, but nothing specific to hang them on.