You want organic to make sure you avoid GMO's. That is really important. The egg yoke is where most of your protein is so what the bird eats protein wise is what is in these yokes. That would be your soy, in my case it's flax seed, and then grass, bugs and other plants. You need to avoid soy because unless it's fermented, it is not good for you or your birds. Grass is very important to your egg quality. If your yokes are not Orange, they are not good for you. Yellow yokes are lacking omega 3's and Lutein. I hope this helps. Mercola.com does have a lot of good info on this subject.