Cracked fertile egg

[Leilukka]

I have a fertile egg that is about 4 days developed. It has been cracked on the side but no leakage. What should I do with it?

 

[nuthatched]

How badly?

 

[Leilukka]

It looks like a hen pecked it on the side, but not badly enough to fully leak it. It has a dent and a hairline crack on each end, like the north and south.

 

[Rock17]

Put nail polish on the crack asap! Otherwise it will not hatch. Seen perfectly healthy chicks hatch from cracked eggs using the nail polish method