Al W. Stinson, D.V.M.
Director of Legislative Affairs, Michigan Association for Pure Bred Dogs, and
the Michigan Hunting Dog Federation, and a Member of the Board of Directors of
the American Dog Owners Association
The following quote was sent to me from Dr. Howard Evans, Professor Emeritus,
College of Veterinary Medicine at Cornell University, Ithaca New York. We were
colleagues in the veterinary college for four years. He is the author of the
textbook, ANATOMY OF THE DOG, (the world's definitive work on the anatomy of the
dog). His statement was in a letter addressed to me on March 26. 2002. His quote
was: "I have spoken with [Dr.] Sandy deLahunta (the foremost dog neurologist in
the country) and [DR.] Katherine Houpt (a leading dog behaviorist) about a jaw
locking mechanism in pit bulls or any other dog and they both say, as do I, that
there is NO SUCH THING AS "JAW LOCKING IN ANY BREED.
We all agree that the power of the bite is proportional to the size of the jaws
and the jaw muscles. There is no anatomical structure that could be a locking
mechanism in any dog." As a Professor Emeritus from the College of Veterinary
Medicine at Michigan State University, I agree completely with their conclusion.
Pit Bulls have a 1800 PSI Jaw Pressure.
Wrong again. Working with author Karen Delise (Fatal Dog
Attacks) we have researched the references used for this data and have found
there is no factual research to support this claim. This myth stems
from an article published in the 1989 The Journal of Trauma "Mauling by Pit bull
Terriers: A Case Report" by Bret R. Baack, M.D., John O. Kucan, M.D., Gerland
Demarest, M.D and E. Clyde Smoot, M.D. On Page 519 it states:
"Pit Bulls bite with greater force than most dogs (up to 1,800lb/in2) (4).
Reference (4) cited for this fact is: "Dog bites in children: Epidemiology,
microbiology, and penicillin prophylactic Therapy but Douglas A. Boenning, M.D.,
Gary R. Fleisher, M.D., and Joesph M. Campos, PhD.
However, neither the topic of bite pressure nor pit bulls is addressed or even
mentioned throughout the entire article.
This case report is promoted by many people as fact, yet it's not substantiated
On the other hand, here is scientific evidence proving this myth is an urban
/x-tad-bigger>Dr. Brady Barr of
National Geographic (Dangerous Encounters: Bite Force, 8pm est 8/18/2005) – Dr.
Barr measured bite forces of many different creatures. Domestic dogs were
included in the test.
Here are the results of all of the animals
Humans: 120 pounds of bite pressure
Domestic dogs: 320 LBS of pressure on avg.
A German Shepard, American Pit Bull Terrier
(APBT) and Rottweiler were tested using a
bite sleeve equipped with a specialized
computer instrument. The APBT had the least
amount of pressure of the 3 dogs tested.
Wild dogs: 310 lbs
Lions: 600 lbs
White sharks: 600 lbs
Hyenas: 1000 lbs
Snapping turtles: 1000 lbs
Crocodiles: 2500 lbs
Pit Bulls are born to be mean.
Not True! Pit Bulls like all other breeds, are not born
inherently mean or bad! They can, like any other breed, become mean through
lack of training, abuse, neglect and irresponsible ownership and breeding.
(From ACF) There is no scientific proof that Pit Bull’s, or any other breed of
dog is dangerous. The Foundation's collective experience and research has found
the American Pit Bull Terrier is a "terrier." All terriers have animal prey
drive, but this does not make them dangerous or vicious. The Pit Bull type dog
comes from Europe and evolved from some Mastiff based breed such as with some
Bulldog blood either in a pure form or to a variation of any of the many terrier
and hound groups beginning with the now extinct Black and Tans Terriers and Olde
English White Terriers. English and Irish immigrants imported the dogs.
Unfortunately, it was discovered in the late 1800's that if trained, the dogs
could be used in the inhumane sport of dog fighting. Due to federal laws passed
in the 1970's prohibiting dog
fighting fewer dogs are now trained for the illegal sport.
The American Pit Bull Terrier is shown in the American Kennel Club
(AmStaff), United Kennel Club, American Dog Breeders Association, Canadian
Kennel Club, and the American Rare Breed Association . The American Pit Bull
Terrier is shown in the conformation and obedience ring. This breed competes in
weight pull events in the ADBA, UKC and International Weight Pulling
Association. The American Temperament Test Society (POBox 4093, St Louis, and MO
63136 Phone 314-869-6103, in the 24 years of testing over 185 breeds of dog,
rates the Pit Bull at 83.1%. This is higher than the national average for all
other breeds of dog. This means the Pit Bull has the best overall temperament.
The American Pit Bull Terrier also rates high in the
Canine Good Citizens Test. The Pit Bull is used for Search and Rescue and as
a Therapy dog. Our Foundation uses them along with other breeds for bite
prevention and responsible ownership classes in the Washington School
Districts. Two US Presidents owned Pit Bulls and countless famous people
own them. In our country more families own the Pit Bull than any other dog
breed in existence. (WAFAmicus Alabama 2002)
From American Canine Foundation:
Since 1936 there have been an estimated 4.8 million registered American Pit Bull
Terriers, American Staffordshire Terriers and Staffordshire Bull Terriers that
have been selective bred for companionship and conformation dog shows. These
dogs are not bred for dog fighting and HSUS estimates 200,000 thousands Pit
Bulls are used for illegal activity. There is no proof that the 4.8 million
APBT's are included in this figure, because the registries AKC/UKC/ADBA that
register these dogs prohibit illegal dog fighting. If it could be proved that
any of the registered APBT's were involved in illegal activity, it would be less
than 4 percent out of 4.8 million. There is an estimated 52 million dogs in the
United States and the American Pit Bull Terrier takes up 9.6 percent of the dog
population and that does not count unregistered ones. There is no such dog
called a Pit Bull Type Dog, it would be a mix breed. (ACF2003)
Dr. Cornelia Wagner DVM, an expert on canine behavior from the University of
Wisconsin, states: BLAMING THE GENETIC MAKEUP OF THE DOG IS WRONG.
(Fedderson-Peterson, D.U.(2001) Zur Biologie des aggression des Hundes, Disch
Tierarzil, Wschr 108 (3),94-101, environmental and learning effects are always
stronger than genetic influence. Although certain dog breeds such as the
Rottweiler and American Pit Bull Terrier have the reputation of having stronger
jaws than other breeds, valuable scientific studies showing significant
differences in jaw strength among breeds does not exist. In summary, the
classification of dog breeds with respect to their relative danger to humans
makes no sense, as both the complex antecedent conditions in which aggressive
behavior occurs, and its ramifying consequences in the individual dog's
ecological and social environment are not considered."
Will a pit bull that shows aggression towards a dog, go after
No animal aggression and human aggression are 2 completely different things!
There are many types of aggression in the canine world and they are all very
Pit Bulls attack more than any other breed.
No, the statistical data on dog bites and attacks are
inaccurate. Many dog bites are never reported. There is nothing in place to
track dog bites in the US accurately.
There are 25+ breeds that are commonly wrongly identified as pit
bulls, Those of us who have been involved with the breed for years have trouble
identifying them 100% of the time, so, we certainly can’t expect inexperienced
people to be able to properly ID a dog. That said, it leads us to believe that
many of the bites that claim to be from pit bulls are in fact, inflicted by
Here are a couple of links to tests, you try to pick the pit
"Identification of individual dogs is possible on the basis of
acquired markings, the possibility of error can never be
Unmistakable identification is possible on the basis of
definition of blood
groups respectively polymorphous protein and enzyme systems
(Schleger and Stur 1986), on the basis of DNA- fingerprints (Jeffreys and
Georges et al., 1988) as well as with microchip identification
Based on blood groups, polymorphous protein- and enzyme systems
as well as DNA -fingerprints respectively canine micro satellites, the
an indicated lineage of two specific parent dogs is possible in
individual dog (Morton et al., 1987; Binns et al., 1995; Fredholm
Wintero, 1996; ZAJC and Sampson, 1996).
Identification of a particular breed affiliation is nevertheless
possible based on exterior markings which are defined in the
standards; however in an individual case the undoubted
affiliation of a dog
to a breed is only partially possible.
Of course, based on canine DNA markers one can execute
genealogical studies about the genetic distance between breeds or populations
(Fredholm and Wintero, 1995; Okumara et al., 1996; Pihkanen et al., 1996; ZAJC
1997) but affiliation of a single dog to a certain breed or the
determination of lineage of a mixed breed dog of certain breeds
canine markers is not possible according to current scientific
(Templeton, 1990)." (Stur 2001) (ACF 2003)
FATALITIES BY BREEDS OF DOG (ACF 2003)
A study at the University of Washington (Bandow, 1966) shows a comparison
between the shares of breeds in bite incidents in comparison with the
recorded numbers. In this study, no statistical insurance regarding the
deviation of breed dispersion resulted. The breed statistic, moreover, is
according to the testimony of the author, to be viewed with reservation.
Breed association is based on testimony of the victim who can not always in
an accident situation correctly identify the breed of attacking dog, or
based on the testimony of the owner who does not always state the correct
As for statistics used to support the idea that some breeds are more
dangerous, the numbers are misleading, said Anthony Pobderscek of the
University of Cambridge Veterinary School. "There's a problem getting
records," he said. "Golden Retrievers bite, Labrador Retrievers bite, but
don't get reported." Dr Wagner presented the results of a study on the
"dangerous dog" laws of Germany earlier this week at the meeting of the
International Society for Anthrozoology in Davis, Calif.
Although they look different, dog "breeds" have no more scientific basis
than do "races" among humans, said canine researcher James Serpell of the
University of Pennsylvania. According to RIECK (1977), the biting dog is
typically male, younger than two years, and belongs to a working dog breed (e.g.
Shepherd or Rottweiler), or is for instance a Cocker Spaniel, or a Chow Chow,
and originates in mass breeding in which temperament or other desired qualities
of a dog are not considered in breeding. The author quotes a statistic about
deaths through dog bites. In 34 death cases in 1989 to 1990, 10 cases were
caused by Nordic breeds like the Husky, Samoyed or Malamute, 10 further cases
were caused by Pit Bull type (mix) dogs uncertain of positive identification.
Seven deaths were caused by German Shepherds, 3 by Dobermans, 1 by a Rottweiler,
and 4 by other breeds.
To claim one breed is more responsible for human fatalities is impossible.
Some would chose to single out the Pit Bull , due to the fact there are
estimated statistics and the type of dogs that resemble the Pit Bull are
such a wide variety that we find Amercian Bulldogs, Boxers, and Mastiff's
labeled as Pit Bulls. It is impossible to compare different breeds of dogs
versus human fatalities.
The Washington Animal Foundation did a survey on human fatalities by dogs in
2001 and came up with these figures, Rottweiler (6); Labrador (2);
Pomeranian (1); German Shepherd (2); Chow (1); Wolf-Hybrid (1); Akita (1);
Doberman (1); Beagle (1); Presa Canario (2); Pit Bull (1); mixed breeds (6).
When comparing these figures with the human fatalities from 1975-80 by Pickney
& Kennedy, Traumatic Deaths from Dog Attacks in the United States, the report
identified the following as responsible for human fatalities during the study
period from May, 1975 to April, 1980: German Shepherd (16); Husky (9); St.
Bernard (8); Bull Terrier (6); Great Dane (6); Malamute(5); Golden Retriever
(3); Boxer (2); Dachshund (2); Doberman Pinscher (2); Collie (2);
Rottweiler(1); Basenji (1); Chow-Chow (1); Labrador Retriever (1); Yorkshire
Terrier (1); mixed and unknown breeds (15). One would question the accuracy of
human fatalities by dogs from current reports and especially the statistics on
the Pit Bull. When looked at from a more realistic point of view one would find
Shepherds and other working dogs rate higher in fatalities. However, given the
increasing population of dog breeds at any given time, it is impossible to
compare one breed to another.
20% of deaths involve unrestrained dogs off the owner’s property, 70% involve
unrestrained dogs on the owner’s property, and 10% involve restrained dogs
on the owner’s property. Unrestrained dogs are responsible for a high number
of dog bite reports and attacks to other animals. Over 30 breeds of dogs
have been involved in 400 human deaths in a 30 year period.
In researching dog bite incident reports for the year 2000 in Pontiac
Michigan, our Foundation found a high number of mixed breeds biting but no
human fatalities. Chow Chows were the dogs biting unprovoked more than other
breeds. We found a high percentage of teasing or tormenting of dogs which in
turn caused them to bite. We found Sight Hounds responsible for deaths to other
animals, yet the breeds you hear about in the media did not rate high. We find,
because of the media attention focused on specific breeds such as the Pit Bull,
that the real statistics are never brought to the attention of the general
public or the politicians, which in turn does nothing to protect the safety of
the public. This misinformation affects the political pressure concerning the
passing of breed bans instead of focusing on passing strong dangerous dog laws
that target the irresponsible owners of all breeds of dog.