My buff orp is 6 1/2 months old. Tonight when I went to collect eggs, around 8pm, I opened the nest box door and she is sitting in there, screeching at me an all puffed up. I grabbed the two eggs in the other box and left her alone, thinking she must be laying an egg. I came back 45 min later and she was still there. I picked her up, protesting of course and took out the two other eggs without her seeing. Is this normal? At what age do they normally go broody? She isn't aggressive, thank goodness, but it seems so strange this early. And will she stay there for long? She won't go to the roost. It's cold here 29 degrees, and I don't want here to freeze.