I don't know the breed but she's a pretty bird. Great colors. Friend of mine had a pet bantam rooster. Damn thing rode around on her shoulder like a parrot LOL
I asked my sister who has about 15 hens of various types, she had no idea lol. She said it looks like a young female though. Keep it around and get a few eggs in a couple months.
This is one of the rarest breeds of exotic chickens in the United States and it has become very popular because of the price that the eggs fetch.
These dark brown (almost chocolate) eggs can bring from $40 to up to $200 for a half dozen. There are a few breeders of these beautiful birds here in Georgia and they all agree that these unique birds are both beautiful and profitable.