Today iss day 7 in the incubator so I decided to candle my eggs to see what progress was being made. 8 of my 9 Light Sussex clearly have veining. One looks clear but I thought I would give it a few more days since I am fairly new at this. My question is with the BCM... I candled them when I received them to look for cracks and I don't remember it being this hard. The lightest one definitely has some veining.... in the others I just see a dark blob to one side. The eggs are so dark I can't see any veining. That could just be the yoke, right? What do I do? I don't want to leave clear eggs in the incubator for fear they will go bad and explode. How long before the dark blob resembles something more definitive... or do I just have to wait? Thanks!