You have sex linked females. They have only one sex chromosome that they received from poor old pappy.
The females will all look like characteristic black females.
The males will have one sex linked chromosome and one non sex linked. If there were no other genes participating in the dosage based trait, the males would look just like the females. This is what people mean when they say "you dont have a sex linked cross". HOWEVER, since other allelez for color exist the gene product " bleeds through". So the chick, just like the adult will have some minor colors that appear in an otherwise dominant trait.
You see, in this case, dominant means most abundant gene product.
So, once again, if it looks like a characteristic female, it probably is. If it has abnormal color(s) this is a male with one sex linked chromosome and one "other".
In other words, the female cant look like anything other than a female (as much as always), the male can vary from female looking to anything abnormal for females (which you describe correctly).
The shanks could be a clue but i dont know if you can determine color difference between the two breeds at this age?