Like the question says, is it possible? Or is there some genetic reason that would make it not possible? The breed of chickens that I keep have a (somewhat experimental) Black variety. I don't actually have any myself; they're VERY rare. But there's been some discussion lately among the breeders who DO keep them about their leg colour. They're supposed to have pale willow green legs, but apparently it's proving rather difficult to reliably produce this on an all-black bird. More often than not they seem to end up with legs that are a mixture of green and black which is known as 'lizard'. Some people have called for the breed standard to be changed to reflect the near impossibility of achieving pale green legs on a bird with black plumage. Other people have pointed out that if bright yellow legs are achievable on a Black Leghorn then pale green legs should also be achievable.. I'd like to know whether it's possible to achieve but difficult, or genuinely impossible... Can anyone help me out with some information please?