I just have to say that although Kirsti is fantastic and I actually did some training with her, that article was about studies in 2002 and a lot has changed in the past 6 years as far as dog training, behavioural assessments and breeding. I do agree with the dogs behaviour stemming from the 3 areas, thats what makes up animal behaviour.

Bull Terriers are NOT pig dogs. They are two different breeds, two different lines... Pig Dogs are closer to Pit Bulls than Bull Terriers. If a dog is bred to attack and kill wild boars, it is in No way safe for families.