I asked a more educated man a long time ago why is blue seen in such quantity in a working staffordshire bull terrier line. I thought maybe another breed brought this to the fold & it was hushed up. Anyway he told me that blue is a dilution of black & it is caused by a lack of "Menalin".
When i thought on it,i bred a black dog out of a blue sire x white & red dam. The dam having no black dogs in at least 5gen if not more. In truth the same could be said of the sire.
Any opinion on the lack of menalin,Jack ?