I have 3 drakes and 3 females which are all laying. Will the females hatch fertile eggs in winter? One nest has 15 eggs in it now. How long can duck eggs sit in a nest before they are no longer able to be hatched? I am going to sell the smallest drake but was wondering which of the other two drakes should I sell?...The one with a greenish beak or the one who is the biggest?? Elva (white) has decided to share Edna's chicken bed who has gone cluck, so I have put 13 fertile CAYUGA eggs under them. They have been sitting on the eggs for 14 days now, which means baby ducks in another 14 days...I'm so excited :-D. ;-) We all live in Hamilton New Zealand.