Hi! We recently got 6 chicks from TSC and they are said to be black sex links. I do know even with sex links there is a percentages of it not being accurate (especially second gen). One is WAY more curious than the others and not as skiddish when I approach them... his comb seems to be bigger than the others as well. His comb is yellow and larger where the other 5 have very small combs and are all black.. (The picture isn’t great.. asked hubby to get a picture and send it to me and this is what I got..... lol) Thanks!