Ok, so last night was only day 6 on my Barred/Blue Rock and EE eggs, but I just couldn't wait any longer so I candled 6 or 7 of them and ALL the ones that I candled had veins!! I could even see the little ball of the embryo swimming around in one! I also candled one of my Frizzle eggs, which was only day 4, and it had veins too! YAY!!!