I have Easter Eggers, Rhode Island Reds, Barred Rocks, a Barnevelder, a Lavender Orpington, and Blue and Black Australorps. I have 2 Black Australorps that have plucked their chest and stay in the nest box for 4 hours, rarely much longer. They scream and puff up when disturbed. Both still roost at night with the others. What is this? Semi-broody behavior? Will they become broody? All my other chickens just lay their egg and get out of the nest boxes, but these sometimes nap in the boxes. I just want to know what to expect, so I can buy some fertilized eggs!!! I also just wonder if this is just the way Australorps are. TIA!