I know that shipped eggs can have a longer hatch time. I guess that would serve to reason that it may take a little longer to see any progress when candling the first few days? I know I shouldn't candle until day seven, but I just got a new LED flashlight and I had to try it out! I only candled two. I just set them Friday. I can see the yolk and the air sac but no veins yet. I know, I just need to leave them alone until at least day seven!