Kerry Blue Explained
  A Kerry Blue Dog carries the Gene Formula (ABCDEGmrSt). This color is dominant in nature and will re-produce itself  when bred to a dog that is the same color even if the mate does not carry the graying (G) gene provided all the other alleles remain the same. The base color of the dog is black. The (G) graying gene turns the coat to a bluish color over time as the dog matures. Taking three or four years to reach the deep blue tones. If the (A) black gene is changed to an (ay) tan or (ayat) sable gene with the rest of the alleles remaining the same the dog will be Mustard. If the (A) black gene is changed to an (at) black and tan gene with the rest of the alleles remaining the same the dog will be Pepper. If the (A) black gene is changed to an (as) saddle back gene with the rest of the alleles remaining the same the dog will be Yorkie Blue. If this dog also has white on the coat it means that the (S) gene would be replaced with one of these White producing gene patterns, (si, or sp) in any combination. For more info see White Chart.
                                                                        MATING RESULTS

Color Index