Hiii. I've had chickens a couple years, but am still learning. I have a hen, shes about 5 months old. Shes under my concrete steps sitting on "eggs" shes been there about 3 or 4 days and when she went for food and water yesterday we saw that all the eggs are just eggshells. But she went right back to sitting o n them. Why?? And how do I stop this before anything happens to her?