Some one had asked about broken eggs, don't know if you got an answer,,,,,,, so first check for soft shells, could be some one is laying soft shell and when the next hen gets in the egg breaks,,,, next, could be a little fight going on over who gets that nest, I have been having soft eggs for some tim about every 3 days some one lays one,,,, lots of oyster shell, crushed egg shell doesn't seem to matter, for me I think it is and age issue. If yours are young ?? check the nest often and remove eggs as soon as you can, that doesn't work to well when you have to work. Good luck,sorry I don't have a great answer
