I went to check on the chickens tonight and one of my buff orpington hens was laying on the floor while everyone else was on the roost. I thought she might be broody but there was no egg under her. I've brought her into the house and she's in a box eating and drinking which is good. I can't find any parasites on her and the only possible problem I can detect is that she can't stand, although her legs are under her so it seems like she has some control over them. Her back looks like it may have been pecked at so maybe she got in a scuffle and is in shock? Any ideas?