The only blue-skinned adults that I have are my silkies, but this chick most definitely didn't come from them. Otherwise, I have plenty of blue legged chickens between EEs, a blue Andalusian, and crosses, but none of them are blue-skinned. Now in my 7-week old chicks, I have one chick(I think it's a roo, but without a red comb I'm not totally sure) who has all blue skin. Any idea how this can happen?