We have our girls in a chicken tractor and let them roam the yard all day. Here's my problem. Our house (people house, not chicken house) is raised and my girls are just starting to lay. They are going up under the house during the day then later I'll find the eggs they laid under there out in the yard, where the dogs have helped themselves. How can I convince them to lay in the nesting boxes inside their tractor coop and not under the house where I DO NOT want to crawl looking for them? The house is over 4,000 square feet, so it's not feasible to try to close it all off.