When I went to collect eggs this evening, one of my coops had NO eggs at all!!! I've been getting 14-21 eggs/day for the last couple months. I KNOW there were a few eggs in the boxes this morning when I checked on the hens on the way up from milking. Tonight when I went to collect all of the eggs, there were NO eggs, and two half pieces of egg shell on the ground. The first thing that came to mind was that I maybe had an egg-eater hen, but the seven nests were bone dry. Also, three of the hens were wanting to roost on the top of their pen, instead of on their roosts in the coop. They've all always roosted in the coop, by choice. All of the hens seemed kinda nervous and restless. I'm thinking it's some kind of predator, probably a snake since the nests were dry. What is it? And if it's a predator, how do I capture it and kill it?