Help with candling!

[islandgirl548]

Hello all!
This is our first time hatching chickens and I am having trouble candling our brown eggs. I'm.not sure what I am even looking for. This is one I did tonight on day 12. Is that just the yolk or???

 

[Pyxis]

!

Unfortunately on day 12 it is safe to say that that egg is not developing

 

[FlomatonsFlocks]

!

Unfortunately on day 12 it is safe to say that that egg is not developing

X2

 

[Pork Pie]

I agree with Pyxis. This link may help for future reference - https://www.backyardchickens.com/a/development-of-a-chicken-embryo-day-by-day