Hello, i have about 15 duck eggs in an incubator and they have been in there for 35 days now and they haven't hatched. I candled one today and it was moving in the egg. I held the egg up to my ear and i heard pecking, they seem healthy but they just aren't hatching. I don't know what to do and i was wondering if there is a way to help them out and try and get them to hatch. They are mallard and pecan eggs so i don't want to do something for a different kind of duck. I am wondering if they are shrink rapped in their eggs.