My (in-progress) duck house stands in a high traffic area, and I plan to put solar lights around it. If I put some gravel down a few inches in front of the walls, will that stop foxes and coons from digging under the walls? What about larger rocks? So far, no predator has dared enter my back yard that is only chicken-wired. I believe this is because of the lights and noise and people entering at all hours of the night. Mr. Fox did take one of my Pekins home to supper when the drake was left outside the gate.