I just started having this issue with egg yolks that are clumpy or chunky. It is as if the yolk is soft boiled. You don't notice it just cracking the egg as everything looks fine, but when you try to scramble it, you realize the yolk is not liquid. More like peanut butter consistency. Not sure I buy the good nutrition argument as I think it would be a lot more common. I would guess most on this board feed their hens very well, yet really limited responses to this thread.