You can candle them and see if they have internally pipped. You can also carefully make a hole above the aircell line, as if you were doing an assist. If the chick is alive in there, you will know. I usually wait until day 24 or even day 25 if I am not sure.
Thank you for the information about the saddle cellSounds like the one silkie egg has a saddled air cell. If it is solid and no jiggly edges, then these can often hatch just fine. It may even straighten out a bit as the chick develops.
If you are not sure about the darker colored eggs, then leave them in the incubator for now. You can reassess when you candle again at lock down. It is unlikely that they are not fertile, but in my own experience my cockerel does not mate with all the hens, so you never know.
I will read about this condition and search for pictures to perhaps be able to compare with what we did see. It is good to know that the little one still has a chance to develop and to hatch fine if it is saddle cell.
Hoping to detect sulfury smells if there is something wrong with one or several of the eggs.
Not completely uncommon not to see much of an air cell with the darker eggs. Keep an eye on that one!Thank you for the information about the saddle cell
Yes I left all the dark eggs inside, but I'm kind of worried to miss something. ...I will sniff the inside of the incubator from now on every time I refill water
Is it normal we couldn't see any aircell in one of the green eggs? It was kind of solid dark/completely dark. All the other green and blue eggs did show aircells.
Ok thank you, glad to know the fully dark greenshelled egg isn't uncommon and has still a chanceNot completely uncommon not to see much of an air cell with the darker eggs. Keep an eye on that one!
Here are a few examples of some rather extreme saddling in some of the eggs I had earlier.
