All too common with pit bulls. I'm not sure why the dog lovers who can see that there is so much difference in dog form across breeds, find it so hard to grasp the concept that there can be equally great differences in temperment too.
Yup.
Border collies, bred to herd, WILL find something/someone to herd.
Labradors, bred to retrieve, WILL find something to retrieve..
Pit bulls, bred to fight and kill, are no different from any random dog.