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BO x BR should give you a sex-link (I'm not as knowledgeable with the BSL as the others)
and BO x SLW SHOULD give you a sexlinked chick...but not all wyandottes carry the gene, depends on the bird...more reliable are the RIW and delawares, if you have hatchery birds.
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BO roo x RIR = mutt and not sex-linked
BO roo x EE = a real mutt, not sex-linked (EE's are already a mutt)
BO roo and BA = mutt, not sex-linked
I don't mean "mutt" in a bad way, just as a term to use for not a pure breed or known hybrid. Look at the sticky at the top of the page for...