Hi! So, this morning starts day 4 of incubation for my 6 Plymouth Rock eggs. Ive looked at tons of pictures of candling and have been reading about it for weeks, so I gave it a go. I thought I would see more! :/ I see veining on 1 of 6, which is my lightest colored egg. I see air cells now, where I couldnt see them at all when I set them. The yolks on a few seem to have gotten bigger and darker, but I can't make out veins. A few seem to have a darker spot within the yolk, but still no veining. The eggs are shipped eggs that I let sit for 24 hrs before setting. Does the yolk getting bigger and darker mean its probably good? Is it common to not see veining adter day 3 on a light brown egg? I have them set with fat end up and am being very careful not to tip them to much when candling because I dont want to disturb that air cell if its still fixing itself after shipping.