My son has a "lab-mix" pup that morphed into an 80 lb pit pull. BWell, Blaze is black with a white chest blaze, anyway.
His newest dog was a "Dachshund mix" (well, reddish brown anyway), that morphed into a black mouth cur mix? About 45 lbs worth.
He's not much good at judging for himself a dog's possible ancestry...
