Biele and creme legbar (or any crele colored bird) should be autosexing. Biele roo and EE hen will not be sexable at hatch. An EE (nonbarred, non white only) roo and a Biele hen will be sexlinked and sexable at hatch but only for that first cross.
I would like to know the answer to this! I have a Biel roo that is 15 weeks, and CL roo and pullet that are 9 weeks old. I was planning on keeping them separate, but perhaps down the road this would be an interesting blend.
I am too impatient to have to wait a year to figure out what will happen when you hatch a cross and then have to wait for them to mature and lay/hatch eggs, and then wait for those to start laying!
I know that immediate gratification is impossible, but having some kind of info would help with the anticipation.
I made the rounds of my neighbors and asked if the Biel roo crowing disturbed them. Everyone said that they liked hearing him!
Who knew that I'd find such a nice little street 10 years ago? It was pretty much a roll of the dice!
Biele and CL should carry the auto sexing function. What you will lose after multiple generations if you aren't careful are the blue egg color and the crest.