How long to wait on overdue duck egg

[sowellj]

We just hatched two of our three duck eggs. They were due yesterday and one was hatched yesterday and one was the night before but started pipping and zipped early Monday morning. The last egg was the best looking one before. It was moving when candled last Thursday. It has not pipped or anything. How long should I give it before giving up?

 

[chickenfarmer5382]

I usually give my duck eggs up to 32 days I realize it should only take 28 but I've had alot of little ducks and geese hatch three to four days late