I had two eastereggers that grew up togetherand they were almost 1 year old. Boo the white one passed away one morning last week,I don't know why but Dixie stayed inside the coop for days, only coming out once. Also she hasn't layed an egg since Boo died. They were close buddies. Is this normal behavor? I'm worried about her. We have other chickens but she won't follow them out.