Dominant vs Recessive White

[TheChickenFanatic]

I have a question: I have a white satin showgirl under a splash rooster, and I've only ever produced white chicks under them. Granted, I've only ever hatched about 12 or so chicks from that pair. I thought for the longest time she is a recessive white, but I plugged it into the genetics calculator, and it looks like she is a dominant white? Could someone who knows genetics better than me chime in?