In the UK a Cream Legbar X white leghorn -- or vice versa...is sold as a hybrid that lays blue eggs...they call it a 'Sapphire'.Interesting--
July I hatched my crossed White Leghorn(utility) to my Legbar roo and at first glance all hatched like typical little Leghorns with a few black random specks--but very random. But then at a few days old(I did not specifically look earlier) I noticed that a certain # of the hatched chicks--4 out of 6 had a darker yellow patch on their heads while the balance did not. So--the auto sexing passed and was visible. My goal was just egg production with a larger blue egg. So I decided to forgo the utility white hatchery Leghorn. I am getting some heritage Leghorns(all colors but buff) and going to go at it again, but that will not produce any data until next Spring. Replicating and testing is a valid scientific method, so why not? It's all just very interesting to me.
Has anyone else crossed Leghorns recently? I did it without knowledge of the developmental research so that's kinda cool Mr. Punnet. I was just thinking about a larger blue egg.
Sadly--I was very short sighted. I have none of the ones I hatched. Didn't really think of the value to retain at least 1 each. Uggh.