Today is day 31 of incubation and none of the 4 eggs have pipped internally or externally. One of the eggs got a weird color on it so i decided to carefully break away at the air bubble and looked in to see it shrink wrapped. It’s still moving and i have added some coconut oil to the membrane it was completely dry on top. I don’t know if that’s normal. These are i think these are mallard ducks so its weird that it’s taking this long. Are the other ones shrink wrapped too? They are moving too and have been actively pushing against the membrane. What should I do??