Any breed of dog can turn, yeah, but I also don't want people thinking that all dogs turn. There has to be something seriously wrong with a dog for it to attack like that. 99.9% of dogs don't TURN ever. Some become aggressive because of lack of training and all that, sure, but they don't "turn" all of a sudden. Dogs are not unpredictable most of the time, unless there is something neurologically wrong.
And in Dinky's case, the dog never turned, so IMO it was just lack of training.