Duck egg turning gray

[Als125b]

Four made it so far! We still have three in the incubator but haven’t seen movement from them in a while hopefully they are resting.

 

[WVduckchick]

 

[Kiki]

 

[Mossyy]

View attachment 1329826 Hey I need some advice. It seems as though one of my mallard duck eggs have turned a bit gray. It doesn’t smell. I tried canceling it and it looks like it is about to hatch but it still have another 5-6 days to go. Any advice?
Thanks

Hey, can I ask what happened with the egg? Mine has gone grey too... did it hatch in the end?