I won some eggs on ebay and they shipped out priority mail on 6/9. I was expecting the package today (the tracking number even estimated delivery for today) and the post office was informed that I wanted to pick it up rather than have the mail carrier take it. Well they didn't come, so now they are either lost or will be here on Monday. I'm really frustrated with USPS. I tried to order call duck eggs years ago and the post office *crushed* them, repacked them, and then delivered them box leaking yolk. Last spring they lost my order of chicks (they showed up two days later, all dead) and now this The eggs shipped should not have been older than three days and now I'm looking at longer than expected shipping time. What I want to know is, assuming an egg is fertile how old can it be and still potentially hatch?