Well, yes, it could be, but you'll never know that for sure. A black sex link is a BR cross with a barred mother. All black sex links are barred crosses (BR, Cuckoo Marans or Dominiques), but not all BR crosses are technically sex links, meaning the if the sire was the barred parent, the chick could not have been sexed at hatch like a sex link could have been.
To be a black sex link, the mother had to be the barred parent as she passes barring only to her sons, not her daughters.
To be a black sex link, the mother had to be the barred parent as she passes barring only to her sons, not her daughters.
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