 George Campbell , 8th Duke of Argyll , chief of Clan Campbell , bred a breed of white Scottish terriers known as the " Roseneath Terrier " . Another breed of white Scottish terriers also appeared at this point , with Dr. Americ Edwin Flaxman from Fife developing his line of " Pittenweem Terriers " out of a female Scottish Terrier which produced white offspring . The dog seemed to produce these white puppies regardless of the sire to which she was bred , and after drowning over 20 of these offspring , he came upon the theory that it was an ancient trait of the Scottish Terrier that was trying to reappear . He rededicated his breeding program to produce white Scottish Terriers with the aim of restoring it to the same stature as the dark @-@ coloured breed . Flaxman is credited with classes being added to dog shows for white Scottish Terriers towards the end of the 19th century . 
