Bluish Splatters on eggs!

[OreoPlymothRock]

Hi, this is my first time incubating eggs and there seems to be a blackish blue splatter on every duck egg except the two goose eggs. Does anyone know what could it be? Me and my siblings think they are trying to hatch and damaged the membrane. Any other advice?

 

[JerseyGiantfolk]

Do you have any pictures? I'm kind of curious of what it looks like.

 

[OreoPlymothRock]

sure. i'll try to post some right now

 

[OreoPlymothRock]

all of them have it except the goose eggs.