Is there a way to tell if an egg is going to hatch?

[hillbillymom]

We have one egg left in our incubator - a goose egg. We have been hatching eggs since last week. First it was chicks, then it was poults, and today our first gosling hatched. Now we have one goose egg left. We are on day 29. How do we know if it is/isn't going to hatch?

We are new to all of this - so I have a million questions. Thanks for all of the help. I posted earlier today about our goose egg hatching and got some great advice/help. I even figured out how to post some pictures.

Now I just need to know if and how long we keep this last egg.
Thanks!

 

[ChickNLittle]

I always keep my eggs for 5 days after the supposed hatch date. If they don't hatch by then or you don't at least have a pip, I would consider them non hatchable.