Currently my Olive Egger pullet from Meyers can't just lay Olive, she bounces between Olive, & Turquoise. She's the only green layer in that coop currently, my Green Queen hasn't started laying yet.
Waiting for the Green Queen, Crested Cream Legbar, & Black Ameraucana to start laying.
I used the method to track a bird of mine that was laying olive. It was successful, though had unexpected results. She eventually stopped laying olive, & soon were just plain brown.
Of course no one believed it was the same bird.
Both eggs, same color blue food dye, from one pullet.
Only...