(Duck Eggs) Can anyone tell me if these are still living or not?

[ProfClucker]

Hi,

New to incubation,

I have 5 eggs, I've candled them all and 2 are moving by themselves but the other 3 don't seem to be. Just wondering if anyone can tell me if they are still alive or not as I've read that if you don't spot and remove dead eggs, they can explode.

Thanks

 

[New duck mommy 2021]

The pic with the dark mass in the middle and no veins around is gone
The other two pics look like blood rings but hard to tell as I can’t see the centre to know if there is veins or a baby

 

[Justso]

Agreed, 2 blood rings, one quitter.