I have a broody mama in her own private chicken tractor. Shes been sitting for 7 days now. She is sitting on 8 (now 7) eggs. Today I find this on the OPPOSITE side of the tractor as her nest. A single egg shell broken into and the insides gone, I assume eaten? Did she so this?? If so, why??? Could it just be that this egg wasnt developing and she knew that? Or does this look like the mark of a predator? I don't know how anything could have gotten in and back out of the tractor ....and if it was a predator, it seems like more than one egg would be missing? Any help appreciated!