Great article. I would mention one thing from personal experience, however. I never had any luck marking eggs under a broody hen and removing unmarked ones. Inevitably eggs get broken or pushed out. Also, broody hens are notoriously dumb about getting back on the right nest after an eating, drinking, defecation and exercise break. If there are other eggs/nests around, she is just as likely to get on them instead and let her own developing eggs chill and die. It's best to move her into a separate pen or perhaps a small separate coop. She may resent being moved and quit, but usually not, especially if you do it at night. But I've found that leaving her in a nest in the main coop with other eggs being laid is almost a guaranteed loss. Waterfowl cannot be moved, but fortunately they aren't dumb like chickens about getting back on the right nest.
