From my experience with chickens, once they start to eat eggs it is almost impossible to get them to stop. Unfortunately, hens I have had in the past that did this had to be harvest for meat. I hated to do it because I loved them like pets but I couldn't put up with an egg eater. I agree with those who say introduce the broody hen and monitor how she behaves with the chicks because if she is kindly mothering to them it will be what is best for the chicks and for her.