We have 3 hens. Our RIR is behaving normally, but our two Buff Orpingtons are acting weird. One had been laying in the same spot in the nesting box for almost 2 days. She did not seem to leave that spot. The other one seemed to be "protecting" or "guarding" the one in the nest box. Then suddenly last night they were up, eating, drinking, and moving around in the coop and run. But today the two Orpingtons seem to have traded places?! The protector is now sitting and the sitter is not protecting. What the heck? Is this a sign they are sick, or broody, or what else could it be? They don't seem sick or sound sick. Any help is appreciated!