I showed and bred Shetland Sheepdogs so when you say blue I of course thought blue merle. But I was taught it is dominant because one parent has to have it or you dont get it. It does not hide like a recessive gene. Also it is a dilution because it dilutes a black dog to silver/grey and if you breed two merles you get the double dilution. Thats why I connect it to splash color in chickens because a splash bred to black gives you all blues, same as a double merle sheltie bred to a black (tri or bi color) gives you all blue merles. I have been in Shelties since 1982 and people have been working hard to figure all the color genes out and there is still more to learn. Chickens seem to be more complicated.Blue in dogs IS recessive. It is a dilution of black - dd. Chocolate is the other dilution of black -bb. I am not talking about merle. Merle is not a color but rather a pattern. That is a whole different can of worms so to speak. And thanks for the complement....want them? lol