We built a greenhouse for our Ladies. They have a few particular places they will lay. Inside the metal bin, under the straw bales (sitting on buckets to keep mice out of them), between the straw bales and the plant racks, and under the plant racks. The also made a couple nests near one wall, and sometimes we fine random eggs near (or in) the pond or around the outdoor pen. We initially used some 2 inch Teflon balls to simulate eggs to get them to lay where we intended.
