Sorry for the billion and one questions, but, when candling coturnix eggs, when should the egg have a nice dark blob in it? So far, I've removed two eggs that I thought were infertile (it's day 6), and cracked them open to see. They were both infertile, and one had a scrambled yolk (not from me opening, so probably in transit or something). But, some eggs looked like they had small blobs in them instead of just veins (one of which was one that I had candled on day 3 or 4 and definately saw veins), while others just had a tiny blur in them. Are some developing slower than others, or are the ones with tiny blurs all infertile? My incubator does have a very distinct smell to it, but I'm assuming that it's the natural smell of eggs, because they smelled like that when they arrived, and the ones that were fertile and had veins smelled this way. It's not a bad odor, just a distinct smell. So, should I toss any eggs that don't have blobs or only have small blurs, or should I wait a little while longer to see?