- Jan 21, 2013
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Kari is correct. Historically both variations exsisted. The green legs that we were originally calling "willow" are in fact technically within the definition of "slate" per the APA judges. What causes the difference in leg color?
If there is melanization in the inner skin layer (epidermis) then black pigment in found within the inner skin layer. Now, if the outer skin layer (dermis) is yellow, the legs and toes look willow green colored and will have yellow soles. The yellow soles happen because the black pigment does not present itself there.
If there is melanization in the epidermis on a white skinned bird, the legs will look a slatey blue color. So, the difference between a willowy green color and a slately blue color are dependend on the skin color of the individual chicken.
As Kari stated earlier, not only have both variations exsisted historically, but the APA judges shared with us that both colorations fit within the category of "slate" as described by the APA. So, both can exsist within the population, however, most breeders feel the slate blue color fits into the overall Iowa "Blue" description better than a greenish colored leg and toe. As a result, most breeders are moving in the direction of slate blue color. However, I wouldn't discriminate a great looking pullet or cockerel of good size and type because it had yellow skin!
If there is melanization in the inner skin layer (epidermis) then black pigment in found within the inner skin layer. Now, if the outer skin layer (dermis) is yellow, the legs and toes look willow green colored and will have yellow soles. The yellow soles happen because the black pigment does not present itself there.
If there is melanization in the epidermis on a white skinned bird, the legs will look a slatey blue color. So, the difference between a willowy green color and a slately blue color are dependend on the skin color of the individual chicken.
As Kari stated earlier, not only have both variations exsisted historically, but the APA judges shared with us that both colorations fit within the category of "slate" as described by the APA. So, both can exsist within the population, however, most breeders feel the slate blue color fits into the overall Iowa "Blue" description better than a greenish colored leg and toe. As a result, most breeders are moving in the direction of slate blue color. However, I wouldn't discriminate a great looking pullet or cockerel of good size and type because it had yellow skin!