Lee, do you mind mentioning these breeds? Looks are looks, they're not genes or pedigrees, but the apperance Pits share with certain terriers and American bulldogs - dogs, though related, not diresctly in the APBT's heritage - make it hard to believe that anything but bulldogs and terriers shaped the breed. Further, the number of good working dogs in this world is limited, and has become increasingly limited over the past 100 or more years.