We currently have two hens. One lays an egg a day like clockwork. The other one lays one every 2-3 days. We feed them a 3 way scratch and a layer crumble. They also get greens and fruits/veggies. When I use the eggs I rinse the shells and crumble them up and strew them in the pen as well (was told that helps produce better shells?). She seems healthy and eats well and is very active. But we cannot get her on any sort of reliable laying schedule. She will lay an egg a day for a week, then nothing for a week, then one every 2 -3 days. Its frustrating! Any suggestions on how to make her more productive or regular?