Have you ever seen a Gold sex-link(golden comet, Red star, golden buff, Isa brown ect...) chicken it is half white and red. A red(gold gene) rooster over a dominant white hen produces a white male with red in the pyle zone( wing bows,hackles and saddles) and produces a female with red/buff base color with white in the neck, wing flight feathers and main tail. So yes they do use them for make a color sexing bird they only thing is that they (white leghorns) could be recessive white and mask black and that would throw a whole "nother" scenario into the mix. Austra- white is a black and white chicken cross. Red and white in chicken colors is a science all on its own I can't explain it but tadkerson sure can as he has on here before but I don't have the links to post it up on here now.Buy from people on here who are reputable, or go to the American Poultry Association website and find breeders of the breeds you are interested in. Check them out and ask around this forum. But really, there is no reason to go elsewhere when you can get birds from the wonderful people on this site. Just check out your state (and/or surrounding states) thread and see who is around and what they have.
For your information, white leghorns are not used for sex-link crosses. They are dominant white, which means when they are crossed the offspring end up mostly white (see Google images for Austrawhite). Cherry eggers CANNOT be used to produce sex-links since they are themselves sex-linked. The sexing thread is mentioned/linked/quoted on page 2 of this one if you're interested in learning more about sex-linked genetics.
If the Cherry Egger being used is indeed a cross between 2 red breeds such as RIR, production red x New Hampshire or vise versa it is still a gold gened male and could be used as the gold side of a sexlink cross.
If it was a sexlink male then it wont be red(gold) it would be a half gold and half silver, therefore not Red in color.
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