It's common for new layers to peck at eggs. They are trying to figure out what just fell out of their butt. Be sure the bedding is nice and thick. Keep the next boxes dark, if that's an option. Fake eggs can be as simple as a golf ball. I also use plastic Easter eggs, weighted down with a stone wrapped in tissue inside, super glued shut. Chickens don't seem to notice the bright colors. Gather the eggs often, and be sure they have oyster shell available in addition to their layer.