Black Sex Links are usually labeled BSL, but they could have been labeled Black Stars, in which case, they would have been marked BS.
LOL! I missed seeing your previous post before I answered with my post above. Sorry about that.Black Stars are the same hybrids (RIR rooster X Barred Rock hen) as Black Sex Links. Black Star is an alternative label under which a few hatcheries such as Murray McMurray market their Black Sex Links. Whoever you bought them from might well have labeled them BS for Black Star.
