Egg yolk is darker and thicker

[Kaili]

One of my girls is laying eggs with a yolk that is much darker in color and it looks like it has spots in it. When I scrambled it, I noticed it is thicker than the other yolks too. Does anyone know what this means?

 

[Bird nut 2000]

Are they free ranging maybe she eats more bugs then the others

 

[aart]

Green(ish) egg yolks......thinks it has something to do with Shepard's Purse in range area and/or cottonseed meal in feed.