Just did the chicken calculator on this, and I think if the Exchequer Leghorn had been the father of the gold/brown chicks, they would have turned out white... Dominant white of excheq., trumps buff?
This really isn't super important, but I'm infinitely curious about it! (and obviously, it is all guesswork at this point)
I only have 2 roosters, a BBR OEGB (but very hatchery quality or even less/yellow legs, coloring a bit off) and an Exchequer Leghorn. (We live pretty far in the backwoods...