Hi, I just found 20 eggs in a nest within my mixed breed duck pen. I have 4 hens, so not sure who has been laying which eggs. I have 3 khaki Cambell hens and a Muscovy hen. I have not seen anyone sitting on them yet, but the nest is out in the open, should I build a some kind of enclosure to protect whichever hen decides to sit? If one decides to sit. Thanks for any help.