sorry no pics showed it, but on 2 of my eggs, at 7 days, I see one long red line, slightly wavy, that I hope is a vein but fear might be a ring. It runs lengthwise for about the middle third of the egg. Maybe the other veins are just shy? Do blood rings show as a full ring or sometimes only part of a ring? edited to add: I'm actually considering giving the 'iffy' eggs to a broody who I let start the same day as these.... and if she kicks it out I'll open to see if it was a ring or a vein. Plus the 3 clear ones.