Crossing a silver roo over a red girl will give you a red sex link and a red boy over a barred girl will give you a black sex link. it really alldepends on genes, by the colors I am referring to I mean the genes not the actual color of the chicken. 2 really good auto sexing crosses are a delaware roo x rhode island red hen, and a rhode island red roo x barred rock henWhat are some other autosexing crossbreds?