[jinx]

According to the Clifton study, pit bulls, Rottweilers, Presa Canarios and their mixes are responsible for 74% of attacks that were included in the study, 68% of the attacks upon children, 82% of the attacks upon adults, 65% of the deaths, and 68% of the maimings. In more than two-thirds of the cases included in the study, the life-threatening or fatal attack was apparently the first known dangerous behavior by the animal in question. Clifton states:

If almost any other dog has a bad moment, someone may get bitten, but will not be maimed for life or killed, and the actuarial risk is accordingly reasonable. If a pit bull terrier or a Rottweiler has a bad moment, often someone is maimed or killed--and that has now created off-the-chart actuarial risk, for which the dogs as well as their victims are paying the price.

However, while banning the pit bull might lower the number of human deaths, such a ban would probably not reduce the number dog bites in any significant manner. After the United Kingdom banned pit bulls in the 1990s, a study showed that the number of dog bites remained the same even though the number of pit bulls had steeply declined. (Study cited in B. Heady and P. Krause, "Health Benefits and Potential Public Savings Due to Pets: Australian and German Survey Results," Australian Social Monitor, Vol.2, No.2, May 1999.)

The most horrifying example of the lack of breed predictability is the October 2000 death of a 6-week-old baby, which was killed by her family's Pomeranian dog. The average weight of a Pomeranian is about 4 pounds, and they are not thought of as a dangerous breed. Note, however, that they were bred to be watchdogs! The baby's uncle left the infant and the dog on a bed while the uncle prepared her bottle in the kitchen. Upon his return, the dog was mauling the baby, who died shortly afterwards. ("Baby Girl Killed by Family Dog," Los Angeles Times, Monday, October 9, 2000, Home Edition, Metro Section, Page B-5.)

link