In early spring when laying gets going all my hens want to lay in the same box. Sometimes 3 hens will crowd in one nest box while another paces and complains wanting to get in too. If an egg gets broken they gobble it up shell and all. Only evidence remaining will be yolk on the remaining eggs and in the shavings. I cut feed bags to act as nest box liners for easy clean up. They have plenty of nest boxes but will only use 1 or 2 and not always the same 1 or 2. They rotate! 
Yesterday morning this was removed from my greenhouse. He was climbing the wall. Thankfully he did not get the babies I'm raising only a few feet away.

Yesterday morning this was removed from my greenhouse. He was climbing the wall. Thankfully he did not get the babies I'm raising only a few feet away.