You are correct, they are very strong, and with that, a very strong bite.
I don't disagree that humans are the cause of many of the problems. But the results of those incidents usually ends badly for the person/dog that becomes the target for the PB. Just not worth it in my opinion.
And I have one of those 5 pound Chihuahuas that thinks she weighs 200. Except for the cat. She seems to think the cat is a lion and is terrified of her.
Not the strongest bite though among the breeds. Labs and Shepherds, if I remember right have a stronger bite.
It sounds like your daughters PB proves how good PB's can be. I am concerned when small children pull on ears, hair, tail, and do other things to antagonize any dog. Not good. The kids need to be taught give animals more respect. I believe this is one way problems start.
I know kids can be rough on dogs. They poke, bull, try to ride,.... I worry it could end badly.
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Children should never be allowed to do that to their dogs. The parents need to see that doesn’t happen. Especially with a risky breed. I had a pit who finally died from cancer at age 12, but I taught my children to respect her, and when they were small they were never left unattended with her. With a pit bull you must always mitigate as much risk as possible. I would not leave small children with any breed. They could inadvertently torment the dog and get bit.