Pitbulls are not quite huge, but definitely big. And they are solid muscle.
I have a story about them that should illuminate what we're all getting at, in all seriousness:
My cousin and his fiancee have a pit bull (mostly) mutt, a female they bought like 2 years ago as a brand new puppy, so it's still pretty young. They love the dog, and it does tricks and loves them and is an all-around great pet. They also own a cat, and the two get along just fine.
Two things:
1.) My cousin is a badass. Both of them lift weights and are very active people, and they have worked their asses off training that dog to be a good dog, and she is.
2.) Training controls the dog nearly all the time, but you have to remember that a dog is an animal, and these animals were bred for specific purposes. Labradors love to fetch and swim, terriers are stubborn and like to kill small vermin, etc. Herding dogs love to nip at you and get people or animals to move places.
Well, once, about a year ago, he took the dog to a dog park and it was just horsing around with other dogs. Well, it being a puppy, it started to annoy an older boxer. The boxer bit the pit bull, so the pit bull in turn went into kill mode, took down the boxer by the throat, and was basically ripping it apart in no time. As you all probably know, boxers are big, powerful dogs too, but this pit bull puppy had this thing bleeding and dying in a split second.
My cousin had to tackle his own dog and perform a choke hold on it to essentially knock the dog out cold. It worked, and the dog woke up 5-10 seconds later completely fine and friendly, oblivious to what it had just been doing a few moments ago.
Nobody was sued, because the boxer started it, but that should illustrate just how bred for, and good at, fighting and killing things those dogs are.
