A couple of the Pekin eggs from my first hatch this year were covered in frost. They all hatched by had to help several. Maybe that was why. Never thought about it. Good luck finding more eggs. When I'm home they get locked up at night. They would always lay in 2 large rubber tubs about 4 inches deep. We have a lot of possums and raccoons in our area. But since I'm only home about a hour a day I left them loose in a large pen with the geese.