I am trying to hatch a Pekin egg and this is day 4 and I candled it and if I look really closely at the egg and kind of move it around I can see a very faint dark spot on the yolk. I'm not seeing any veins or anything . . . but could this possibly be a duckling growing? I tried previously to hatch four other eggs and they all failed so now I am trying this one and I'm hoping it will work. I can't see anything if I hold the egg still . . . but, like I said, if I move it I can see a tiny little black blob on the yolk. Does anybody know what this is????