Interesting that it states that homozygous hens have bluer eggs than heterozygous hens. I couldn’t see a difference from my pure Cream Legbars vs. my heterozygous “Sapphire” hens which were Cream Legbar crossed with White Leghorn.I know this is an old thread but info on Dongxiang and Lushi - www.aviculture-europe.nl/nummers/13E05A07.pdf . It's not much but maybe will help you