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- #11
If this is the Only chick you will ever hatch, it could be due excess melanoblast migration during embryo development and not related to any genetic mutationYup. Only chick hatched like this. Mottled Japanese parents. Dad hatched from a line that only throws mo^j/mo^j mom was phenotypically mo^j/mo^j. Other female that I got with her is genetically proven to be mo^j/mo. But that female was broody and none of her eggs were hatched this brood.