I have 4 broodys all sitting on eggs, not sure how long some of them have been sitting but Onyx's were due to hatch on the 11 th of this month and no chicks yet, I know she has been very faithful to the hatching process but still nothing! How long will she stay on the nest? Should I change out the eggs. All of the eggs under here should have been fertile as I have two very busy roos. Could someone please advise me as what to do? If i put fresh eggs under her will she continue to be broody or will she give up too soon? Thanks in advance , Sandy