I have a question about my 5 mo old Olive Egger. She has begun brooding about a week ago and hasn't even laid her first egg. She stays in the coop all day besides from coming out in the am to eat and drink. She lays at the door of the coop which sometimes threatens the other chickens from going in. She hisses and raises her feathers. I've tried getting her out of the coop a few times to go eat during the day. I'm worried about her. It's 95 + degrees here. Does that have anything to do with it? I've also noticed my other chickens that are at laying age have stopped laying. I'm sure that's do to the heat. I'm just wondering how long does a hen brood before laying her first egg? Thank you in advance for any suggestions.