My wellie hens were using the nest boxes just fine last fall. We moved the Welsummers into their own quarters and hung a nice nest box on the wall. It's at the same height as the one they used to use. They started laying on the ground. In late October, they took a break from egg laying and have enjoyed a long winter "vay-cay" until just last week. On Tuesday, we found our first egg in months. It was back in the corner on the floor of the coop. Three days later, another egg on the ground. I put an egg in the nestboox to entice them back, but it hasn't worked so far. What should I do?