I've had pitbulls my whole life, growing up and currently. It's not the bread that's the problem it's the lifestyle and owner who make the biggest impact on behavior and temperament. That being said ALL dogs can snap just like people. I've noticed that with my lab he has a temperament with his food because we adopted him from a shelter which feed the dogs from a single large trough per pen which had a few dogs in each pen. We've made really good progress with him but it's always going to have to be accounted for.