Please advise! I have 6 duck eggs under a broody bantam hen. Five of them began pipping 36 hours ago, on Sunday night. This morning they are no further along. I picked their pip holes a bit larger, not much but enough to try and encourage them, about the size of a small shirt button. Their beaks are still moving and they're peeping. I put them back under Mama hen. What more, if anything, should I do? How long before I open them even more? These are eggs from a friend's duck, she has been having trouble getting them to hatch in an incubator and we really want these to succeed. Thank you for your help!