Mom sent me a dozen Pekin eggs from Drako and Daisy.. Donna duck wasn't laying. My question is, mom has been saving for over a week, she mailed them to me and it took a couple days, no eggs broke or visibly froze. How long can a fertile egg be viable? Mom says the ducks "get it on" several times a day and she didn't write dates on these eggs so I don't know which one is oldest. I guess after I let them rest and get house temperature I'll pop them in the bator and see, as soon as my chicks get done!! (hatching as I type)