Harrison Forbes, author of the book Dog Talk told The Globe:
Pit bulls are very strong dogs. They were bred initially to hunt large animals. And for more than 200 years after that, they were bred to be fighters. You can breed certain things out of dogs, too. But that does not happen after just one or two generations. It will take a while, during which time any change will be attributable to responsible dog ownership.
Shall we now do a Google search of "Child pit bull attack" to get an idea of the horror that continues while we wait for responsible dog ownership.