I accidentally interrupted one of my laying hens when she was in the box about to lay. She got off the nest and joined the others for a treat without laying the egg, and when I just went to check a few hours later, there's still no egg. Is this unusual? This happened once before with another chicken, but after she got up off the nest and had a treat, she went back to the nest and popped out the egg. I'm perpelexed why my leghorn hasn't gone ahead and resumed her egg laying for the day.