my cousin has 2 pit bulls and has had them since Anthanee was born he is now 6 yrs old, the dogs love him they are very protected and won't let anyone they don't know come up to him with out Justin or Nicole there, there very loveable dogs, I think any dog can be mean not just a certain breed, it depends on how they are raised but like any human once in awhile a mean one is born for no reason