Mine go semi-broody. I have three who are most prone to do that. They'll sit on the nest until the rest of the flock leaves the pen - their flock instinct seems stronger than the broodiness. Once off the nest, Sechs and Funf will make distress calls, which I take to mean they are concerned about their eggs, but they run back and forth between flock and nest for a while. If I wanted to hatch eggs, I would either invest in an incubator, ask someone else to incubate them for me, or get a broody duck (if that is even possible).