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They are fairly similar mutations Dun is a mutation of Dominant white that acts on Black much like Blue does. the opal mutation of rec. white is independant of Black the same mutation has occoured in europe in two other breeds as well.
They are fairly similar mutations Dun is a mutation of Dominant white that acts on Black much like Blue does. the opal mutation of rec. white is independant of Black the same mutation has occoured in europe in two other breeds as well.