I've seen a few of those in the pen, too but not in the nest boxes. They look like lumps of divinity fudge or some sort of baked good dusted with powdered sugar
. Perhaps it is the poop that comes right after an egg is laid and the opening is still loose from the egg's passage or the hen just has less sphincter tone so the poop comes out larger than usual. Being suspicious I never tried to pick one up - ......
