Board Thread:General Discussion/@comment-10819339-20140302194636/@comment-24108228-20140305205655

It wouldn't have to be manned.

If the space that each nest takes up expands when the chicken hatches, it is basically a self building tower. A bit like if I made a tower of magic floaty water, then froze it to make it expand, it would be higher. Just replace the water with nests and ice with nests with chickens hatched inside.