
Originally Posted by
http://www.realpitbull.com/myths.html
“Pit Bulls have more bite pressure per square inch (PSI) than any other breed.” This is pure speculation at best, damaging myth at worse. There have been no exhaustive studies conducted to prove that Pit Bulls have the strongest jaws of any breed. There likely could not be any truly conclusive testing done to measure something like strongest breed PSI. A reason for this lies in the fact that dogs bite with varying pressure depending upon the situation, and what factors are driving the bite at that particular point in time. A dog cannot be instructed to bite down on a measuring device as hard as possible, so a tester could have no way of knowing whether or not a particular dog being tested is actually using its jaws to capacity in any given testing phase. There is also large size variation in any breed, and one must assume strength varies as well. A very large (but not typical or standard) Pit Bull may bite harder than a small Rottweiler, German Shepherd, or other breed, while a standard sized Pit Bull may not have as much jaw power as a larger, typical sized Rottweiler, etc. Also, if one breed is to claim “highest bite pressure”, all breeds would have to be compared. All 500+ of them.
Dr. I. Lerh Brisbin of the University of Georgia states, 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. There are, moreover, compelling technical reasons why such data describing biting power in terms of ‘pounds per square inch’ can never be collected in a meaningful way. All figures describing biting power in such terms can be traced to either unfounded rumor or, in some cases, to newspaper articles with no foundation in factual data. (From the ADBA booklet, “Discover the American Pit Bull Terrier.)