My gosh what a beauty. My brain wants it to be a golden campine but to tell the truth I have no idea what they look like. Is this a flash of my intuition or the death of another brain cell?
It is a little hard to tell with that picture, you might try posting one without the cage bars in the What Breed or Sex? section of the Forum. Is that your only bird? chickens are very social animals and usually do better if kept with a friend or two.