Well alot of pits arn't "full pits" per-say. Alot of them get adopted or are from such inbreeding they get messed up in the process. Pits are very territorial, and stubborn as hell. If from the get go you dont show dominace and let the pit know you are the alpha (female or male).. The pit will try and take advantage, and try to get to the head of the pack. Hence the "attack on their owners". I went through a whole class about pits when I worked at one of the vets I used to..