The hen that laid this is my toubled hen, Ms Pissy. She was so good all day with the others, and turned evil on the roost last night, so I removed her, and sat her on the new roost we added. Now I remember someone saying chickens can't see well in the dark, mainly almost blind in the dark, so after putting her there, I shut the door. It was pretty dark in there. I came out today to this......Mind you, she must have stayed there all night by the looks of the poop board. LOL Is this normal, or is she lacking something? Maybe lacking something that causes aggression too. One person mentioned lacking protein? Should I put her back on starter grower, maybe mixed in with the layer? They all have free access to oyster shells, but with her being crated the last few weeks, she has not had any. Could that be why?