Our Mille has not had an egg in four days. She is a seven month old Rhode Island Red. Her coop mate is a cream legbar of the same age and she is still laying. Millie was very consistent but has suddenly stopped. She is eating, drinking and acting very normal. She is the boss hen. Recently the three young chickens who are only four months old have started sharing the coop space at night. Could that be throwing Mille off? Not sure why she would just stop?