I am getting antsy! My ducklings have been peeping since Tuesday and we don't have a single pip. About how long is it from when you can hear peeping until when they pip externally? They have been on lockdown since Tuesday because when we candled them we could see that at least 5 of them had broken into the air cells and it was later that evening we started hearing peeping. I am getting nervous that they aren't going to hatch at all.