I built a new coop a few months back. 8x10 - much larger - tons of space. I have 4 nesting boxes that are on one wall. I also have about 12 inches of shavings on the floor. My hens refuse to lay in the nests. They settle in right next to them or in other corners of the coop. My real issue is by the end of the day when I collect the eggs - they are buried. I often miss an egg or two & I'm afraid there may be many more lurking somewhere under the shavings. How can I encourage them to use the nests (18 x 12) & not the floor?