In before the pit bull apologists.
I’ve never owned bull dogs and never will - actually, I’d rather not have any pets. Not even a pet rock.
But in my LEO experience, I never had any problems with Pitt Bulls, Dobermans, Shepherds, Mastiffs, Rottweilers — all the typically “bad” dogs except for one bull dog when I got too close to her new litter of puppies.
But if we are creating a list, I would add Dalmations, Chows, Collies (the Lassie type) and medium to large indeterminate mongrels as those were consistently agressive and/or attacked. And for the record, I never shot a dog. I knocked quite a few on the nose with a flashlight and they kept their distance after that. Maybe I was lucky...
Just my personal experience - opinions may vary.