Hello. I have 12chickens,and I receive about five seven egg a day, I believe some of them don't lay yet, or one is old. But, one chicken, who is everyday layer, start destroy egg. I just caught her doing it. They have four laying places, two boxes under shelf, and two shelves, but they only put eggs in one spot. What I can do to encourage them to lay in other nesting boxes n not destroy eggs?