Statistically half of all sexlinks are roosters. 
You just got to pick out the hens. At 4 weeks, doesn't look too rooish yet. Probably a sexlink with lots of leghorn in it's past, but it's not a pure leghorn for sure.

You just got to pick out the hens. At 4 weeks, doesn't look too rooish yet. Probably a sexlink with lots of leghorn in it's past, but it's not a pure leghorn for sure.