Black, red or blonde with white markings, and tricoloredLife span. McNabs are now competing successfully in agility trials, dock diving, disc dog competitions, herding, lure coursing, dog sledding, skijoring and flyball. The McNab Dog – commonly called McNab Shepherd or McNab Collie – is a herding dog that originated in the Mendocino region of Northern California. Their eyes are set well apart, almond shaped, and brown, hazel, or copper colored.