X2
No, Sex links are not sexable after the first generation. They will break back to the parent stock. Auto sexing breeds are sexable generation after generation.
All of those are imports. We did not develop auto sexing breeds in the United States.
Cream Legbars
Rhode Bars
Are two that are here.
More are listed here but most are not available in the US. http://www.autosexing.co.uk/
Now this is what I was wondering. I made OE's blue/black sexlink using my blue amer roo and a GCM. If I take the roos which will be barred and put back over the GCM wont those be sexlinks again? It would be like barred rock head dots defined ones would be female and the splotchy ones would be males. That's what I'm thinking anyways. I'm trying to make a F2 OE sexlink. I saw someone online selling F2 female chicks but don't know how they sex them besides how I described.