Kind of looks like an external pip, if it's moving about can you candle and see if it's bill is out of the membrane?So i'm not quite sure if this is anything. I'm still very new to this whole incubation thing. But I found a hole in one of my eggs that was originally under a broody but now they are in my incubator. I just threw out an egg that had a crack and the same type of hole because it had died. I don't want this one to die and it's still moving in there I just candled it. But here is a picture of the hole on the egg.
is this the duckling trying to get out? Forgive as I have forgotten what that's called. Sorry the picture is a little blurry.