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Yes. However white leghorns often also have black & silver and may have mottling, blue, recessive white etc. Various genes to help make them a cleaner white. The cross will be mostly white with black flecks and the roosters probably will show red on hackles/saddles.. cross them again with a BBR and you should hit on a few BBR with the dominant white gene. You could probably make Crele leghorns too if the white line you use has barring in them. Crele is just barring over a BBRed bird. Those probably would have some popularity(even I might be interested, lol).
I will use the hatchery white leghorns, I am guessing they are pretty consistent white genetically.
We'll see what happens.
Should look interesting no matter what.
Dominant white works by preventing black pigments from showing up.. so if one tries for a white bird using dominant white, they need to use a bird that is genetically solid black for it to have the best effect. Dominant white has little or no white on red/gold pigments, that is why BBR birds pure for dominant white still have red on them(that would be the Red Pyles).
However, even with a solid black chicken, dominant white does not always perfectly make a clean white bird. So breeders add various genes that 'help' make sure the white is consistently a clean white bird.. and those genes are barring, mottling, blue, recessive white, silver to name a few. So a lot of leghorn lines for this reason are usually in actuality a solid black chicken with one or more of the 'helper genes'. Just that you can't see those genes as they are hidden from view from the white-ness. But they can and will show up in crosses and mixes. It's normal and to be expected.
