If you know the breeding behind the hen or rooster, you can make a good guess. Dominant white is common in White leghorns, Rhode Island whites, and others. If you breed one of these to another colored chicken, the chicks will predominantly be white. (Assuming the parents are homozygous for white).
Recessive white is common in White plymouth rocks, orpingtons, and others. They have to have two of the white genes to be white. When I crossed my white rock to my turken, all the babies hatched black. That is how I knew she was recessive white. If the all the chicks had been white, I could assume the parent was dominant white.
Hope this helps!
Yes it does, thanks!