Leghorns are not all white--I do not think they used white leghorns.No I haven't read the entire thread but I studied the first page at least 20 times. My question is concerning the Ark Blue Ro that will have blue or black feathering however it does have white leghorn in it's lineage. Could this cause the sex-linking not to work?
They came from whiting farms and were then selected for the Blue black splash genes:
http://www.whitingfarms.com/index.html