I have a blue Australorp who lays an egg a day and doesn't get up early in the morning, which worries me. She has been sleeping in for about a week.. but continues to lay. It has been a cold damp winter, by our standards, and I am a novice chicken keeper. (I have had 'words' with her and told her I really wouldn't mind if she stopped laying for a bit if she's unwell-joke!) I suspect she's sick or something. Any ideas?