Well they don't breed true because they are not breed, so you won't have sex link breeding sex links at hatcheries. You won't get a sex link as we know it doing that. They're created each time using various mixes. So more than likely I had a mix match of parent breeds in my sex links.I work at TSC now and it’s very hard to screw up putting breeds of chicks in the correct bin. However, the hybrid sex link breeds don’t breed true because they are mutts.