Wow so much different. Thank you !!Good question! Black Sexlinks are specific mixes designed to create chicks/chickens whose genders are easily distinguishable. Black Sexlink hens look very different from roosters. I included a picture found online of a BSL hen and rooster for comparison. Your hens are Barred Rocks. The reason your rooster is likely a BSL or another mixed breed is due to the poor barring and color leakage.