Has anyone noticed a difference in the yolk colors between breeds in a mixed flock? Our single Leghorn girl ( courtesy of granddaughter's embryology project) lays eggs which are definitely lighter in yolk yellow than our orps, RIRs, and marans even though they are all together, free ranged and fed the same. All the yolks vary from time to time in shades of orange ( diet bug content?) but always the leghorn's is light/bright yellow while the other breeds' are dark yellow/orangish. Things one notices when frying breakfast eggs! Or should this move to the Egglaying section?