As far as the possum, I went out one day in the morning to all the ruckus and another hen was on this mama's nest. I got her off and the mama got back on her nest. When I went back out in the evening to gather eggs, I lifted the lid on the nest box and thought there was a snake in one of the nest boxes. Yep, I 'bout wet my pants right there! But it was a possum curled up taking a nap. And there was mama hen sitting two boxes down on her nest. My generous BIL gathered up his gun and came over to take care of the possum. That mama hen didnt' budge.