I am incubating duck eggs. Today is day 27 and I have one that is starting to turn black and hasn’t externally pipped yet (my others have). On Day 25, it was moving around a lot in the egg (the egg was shaking in the incubator). So I thought everything was good. Do I open the incubator and take it out? Or is it fine to keep it in there? I know there was a live bird in there at some point of time.