Are these eggs viable!?

[Pixiefarie]

First time hatching duck eggs! Can you tell me if these look like they are developing correctly? The blood vessels and embryo look like they are developing but there is what looks like another air sac on the back side of the egg. These are Cayuga duck eggs on day 7. We can see the red blood vessels and little embryo/ fetus. Help!

 

[Siobhan4n]

First time hatching duck eggs! Can you tell me if these look like they are developing correctly? The blood vessels and embryo look like they are developing but there is what looks like another air sac on the back side of the egg. Help!

cant really tell from pictures
What day incubation are you on?
Can you see red veins and small feutus?

 

[Pixiefarie]

Oh, duh! We are on day 7. They are Cayuga duck eggs. We see the red veins, and fetus. But the large sac is what I'm worried about!

 

[Siobhan4n]

I would double check them again tomrorow
The air sac should be at the bottom of the egg...
If you can see the veins and feutus that’s a good sign, if you watch closely enough u should be able to see a little heart beating
You can look up detached air sacs online and see if they look similar. Usually if it is detached the feutus will still grow but won’t survive the hatch!
I can’t see clearly enough in pictures but eggs look viable enough from what I can see x