Pit bulls are not the only dog that is easy to make mean, but probably the most infamous.
This type of problem is not just with pit bulls.
Almost all dogs have a natural tendency to chase things that run from them. It’s part of that whole I’m-a-dog thing!
When I've walked her around Warsaw, we've met a number of dogs -- a few pitbulls, American Staffordshire terriers etc.: male and female and those pitbulls were nice and friendly to both me and my puppy.
the only dogs that tried to attack my puppy were German Shepherds -- this was surprising as I thought dogs wouldn't attack a puppy. Why aren't GSDs up on that list with pitbulls?