The rooster is a Silver Lace Wyandotte produced from a SLW Rooster x Gold Lace W Hen. The egg could have been from a SLW or a GLW or Black Australorp, Buff Orp, Buckeye, Cockoo Marans or Easter Egger (they all lay brown eggs - long story, but only 1 live chick). I'm leaning to another Wyandotte. Photo is from today at 12 days old - lots of feathers including a tail already, hoping for a pullet! Just posting this for fun, obviously with this mixed flock I don't really care.