So my girls have dug a hole underneath their feeder. Its maybe an inch or so deep, and its a perfect circle shape. I thought they were just digging up food they dropped. But I've noticed one of my girls laying in it. In fact, she seem quite perturbed at me when I disturbed her lol. Is it normal for her to just be laying in the dirt? They are 19 weeks and I think they are getting ready to lay.