I can hear the oldest one through the shell already, the only time I assisted was when the cheeping became frantic and I could hear it in the other room. Even then all I had to do was make a small viewing hole and a cluster of little cracks in the egg and 6 got out (almost) on his own. I tries to mimic what I saw the other ducks do. They didn't make a zipper around the whole top of the egg, they cracked the egg around the top the pushed their way out, hollering and squeaking the whole time. The only time they were quiet was right after they pipped, my lazy duckies too a 8-10 hour nap before finally starting to zip. But after they are out, take a look at the shell and how much thicker it is than a chicken egg and the fact that all they have is a little egg tooth and a blunted bill and you will understand why it takes the little darlings so long.