Oops. I thought for sure they were all duck eggs. Since it hatched yellow, If it was a white or off white egg, the hen was probably a California white (most likely) or a silver leghorn. If it was a light brown egg, the hen was a Bresse. Roo possibilities are Bresse, Mottled Java, Cream Legbar, or Dark Cornish (not likely, the other roos don't let him near). No matter the father, chick will most likely be white with a few off colored feathers. Bresse would be all white, Legbar would have a small crest. It will be interesting to see what it looks like as it develops. If it has a crest, and if its a hen, it will lay green/blue eggs. Otherwise most likely light brown as I don't have any white egg roos.