Were there threads about it actually happening? Or the fact that it “could” happen?
It kinda strikes me as one of those things everyone has heard about but never actually happens (like all the things that are poisonous to chickens but aren’t).
That being said, I guess if you composted...
My chickens (and many others) have compost areas right in their runs. This is a non-issue.
For yolk color, I recommend steamed butternut squash or pumpkin.