According to the same Dr. Brisbin, «To the best of our knowledge, there are no published scientific studies that would allow any meaningful comparison to be made of the biting
power of various breeds of dogs.
According to Dr. I. Lehr Brisbin of the University of Georgia: In regard to claims of massive 1200 P.S.I., 1500 P.S.I., 1800 P.S.I. jaw strength he says, «To the best of our knowledge, there are no published scientific studies that would allow any meaningful comparision to be made of the biting
power of various breeds of dogs.
The American Heritage Dictionary defines Working Dog as: (n.)
Any of various breeds of dogs developed or trained to do useful work, such as herding animals, pulling wagons or sleds, or guarding property.
To me, it is simply incredible to think that
all of the various breeds of dogs belong to the same species.