I have a buff orpingtion that has been laying eggs for about a month now. Last night when I went to close the coop, I saw her in the egg laying box (she usually roosts up on a perch). Went to check early this morning, and she was still there. Around noon, still there, but found no egg underneath her, except a plastic egg that had split open. I took her out, so she would eat and drink. She is still out, but whenever any other chicken comes around her, she gets all puffy, and I have seen the winds lower to ground. Is this normal? I suspect she is broody, but not exactly clear as to all symptoms of this condition. I do have one rooster, that is only 16 weeks old, but have not noticed an action. LOL Please help a newbie chicken owner out, and explain this behavior. Thanks a bunch.