I bought 20 shipped khaki campbell duck eggs. They seem to have been handled very roughly + x-rayed or so. only 9 remained for lock down, but except one, all the others didn't occupy the whole egg when candled on day 25. one hatched yesturday, but I see no pips on the others. I candled them again, and although some development has been shown, only one occupy the whole egg. That one has his bill in the air-sac. I was wounduring if I should make a small hole in it to help him. I don't think the temperature was too low during the incubation period, so I don't know why they are hatching late (if at all). Thanks a lot!