My poor barred rock Kiwi sang and sang today for over an hour. I thought something was wrong, so when I went to check something was SERIOUSLY wrong! Ciabatta, our Orpington, was taking too long and IN HER FAVORITE BOX!
As a side note about egg pecking, maybe try leaving a bunch of fake wooden eggs in the nest boxes? She may realize nothing fun is happening when pecking, and hopefully stop the egg eating before it becomes a habit.