As best I can remember, my chicks did not have ANY white at any time as they were growing up. The desired color for buckeyes is a deep dark red/brown color. So light gold/yellow feathers (I have plenty in my birds) or lots of black feathers (a couple are okay) are not desirable. I would guess that white feathers are not going to go away as adults.
Please let me clarify my definition of "bad breeding"... in this case, "bad breeding" simply means "breeding for traits other than those that you want." If your birds are from a hatchery, undoubtedly the primary trait they were selected for was egg production. (Think about it... hatcheries only make money when they hatch eggs, so they want lots of eggs...) They likely also selected somewhat for color, size, temperament, and conformation, but when you select so heavily for only one trait, you can't help but lose quality in the other traits.