You can't tell by candling an egg if it is fertile or not before you start incubating. (At least not with my eyes!!!) All you can do is crack some open and look for the bullseye which indicates fertility. Even that may take a trained eye. The best way to proceed is to gather the eggs and put them in the incubator. Wait until about day 10. If you see veining and possibly a little embryo they are fertile. If they aren't showing anything by then they are duds. The one exception being that a really dark egg or a blue egg is often hard to see in. I normally give them a little longer. Just toss the ones that aren't developing.
Those definitely have some strong Anatolian in them. What other breed(s) are in there?
My DIL posted a link that I found very good. I think it's good reading for people who raise birds.
http://www.agdaily.com/insights/farm-babe-top-8-myths-gmos-debunked/
You wouldn't believe how many people, especially those buying birds for the first time, want to know if I feed non-GMO feed or if I feed organically grown feed. First off, it is nearly impossible to provide non-GMO feed. Even if you grow your own grains and make your own feed the seed you use will most likely be GMO seed. Secondly if you purchase organically grown feed you may as well guild those birds in 14kt gold. I guess if you only have a half dozen hens you could afford it but not for a good sized flock.
If a grain is genetically modified that doesn't mean you are going to be eating chemicals. I avoid pesticides and chemicals as much as I can in my own food, but since I have to buy most of the ingredients for bird feed, it's just impractical to believe I could raise birds with guaranteed non GMO feed.