Abnormal muscovy egg when candled at day 25

[K4zn4v3]

So Right now I have Muscovy eggs in my incubator and they are on day 25. 7/8 are perfectly healthy and taking up most of the available space by now. One of the eggs though has much less shadow. At first I thought that the duckling had died a week or two back but then the shadow started moving a good bit. The duckling that occupies the egg is currently about half the size of the others. So has anyone experienced this? Is the duckling going to be a runt? What are the chances of this duckling hatching and surviving, if it’s destined for failure I would rather take it out of the incubator now rather than letting it hatch and die.