Fake eggs are definitely something I would recommend. It lets the new layers know where to lay, and it gives them the feel for sitting on eggs, and they won't be able to break any! I built a nesting box about 6 inches away from where they sleep, they love laying in there, and my rooster encourages them to. It's high off the ground, about 4 feet, and he deemed it safe. Do you have a roo? If not, get one if they're allowed, they help your hens, and tell them good spots to lay and even make them nests.