The first one of course should hatch out in the next day or so, the other one, sounds to be rotten to me. I have hatched out many many duck eggs, and those kind were usually the ones that went bad.
Did you candle them earlier? Did the second one ever have a ducky figure to it? Or was it always sort of vague?
Have fun with your new baby!!

Hello-

Thank you for your advice. The other egg did have a shape inside and we could see it moving when candled before it got so big. It doesn't smell at all. We had another egg that died about 1/2 way through and it was gray and smelly. We did get it out quickly as we have a very eager 7-year-old who looks at the eggs multiple times a day just to make sure they are still in there! : ) The questionable egg is larger and a different color than the peeping egg. We were wondering if maybe it was a Muscovy duck and could take a little longer.

mary

That is quite possible, since you did see some movement earlier. I would give it a few more days to make sure. I believe Muscovy eggs do take a bit longer than the usual ducky 28. I have an eager 7 year old too and I know how dissapointed they can be when one doesn't make it. I hope it does. Good luck.

Muscovy eggs take 35 days to hatch. You can put the egg up to your ear and listen for movement. If you think the egg might be rotten be very careful when you handle it. You don't want it exploding at your ear.