darth pike, id like you to be my best friend.
if the parents were told "dont let your kid run around." and they let their kid around, the parents are to blame.
a lot of dogs are pretty freaked out by kids. kids are loud, the make really awkward movements, they dont have too much control of their strength. that and, if the dog is feeling threatened in a pin, he will most likely react in that manner. he has no where to run.
they didnt warn the parents because the dog is a biter, they warned the parents because they know what theyre doing.