You can make a Black Sex-link by crossing a Back Copper Marans male (or any other non-barred black base colored male) with Cream Legbar females (or any other breed with sex-linked barring).
If done with the black males over barred females all the offspring should come out black. The males will...
Yes, I if the Silver Crested Cream Legbars is a pure bred silver based birds with the cream diluter and cresting there isn't a problem with the auto-sexing, but if is is some type of cross of a pure Crested Cream Legbars and a none barred silver based breed then the cockerels from that cross...
I have made a similar cross with Black Copper Marans and Cream Legbars rather than Cuckoo Marans and Cream Legbars. Below in the mother (BCM), father (CLB) and offspring (Cuckoo Cross Breed).
1) First question: What is the make up of your silver crested Cream Legar? The reason I ask is...