A customer called today and described the egg yolk his wife had broken into a bowl. I had him send me a picture. I have never in my life…..!!!
The yolk is olive green and the white is crystal clear. I must say it looks disgusting!!!! He was quick to tell me he did not buy the hens from me!!! He has an assorted flock of Barred Rocks, Rhode Island Reds and I think he said Ameraucanas (Easter Eggers). I have seen a few things in my years; blood in the yolk and even a worm one time, but never anything like this.
We went to our friend “google” and typed in “olive green egg yolk”. The results were very interesting.
An olive yolk in a raw egg seems to be caused by diet. There were several articles and one said green grass or alfalfa. But that does not make sense to me. Free range chickens eat a heavy diet of grass and their eggs are not olive green. We have found that chlorophyll that makes grass green, makes egg yolks a deep rich yellowish orange. Another article said acorns, some weeds or herbs such as Shepherd’s Purse will make the yolk olive. Shepherd’s Purse contains an alkaloid (bursing), tannin, and some sulphur.
I know if you hard boil an egg too long the yolk has a dark green edge around it. This is from the minerals and sulfur in the yolk that you destroyed by overcooking. It makes sense to me that Shepherd’s Purse could be the culprit and apparently it is common in our area.
I have never identified Shepherd’s Purse in my yard, but here is a picture of it.
If anyone else has any expertise or experience with this I would love to hear from you.
