so yea, I have a Pit and I work in the Dog Grooming business. Here is my list of dogs who have bitten me the most and are the most agressive. 1.Welsh Corgie (Bitten in the face, hand, leg, and arm...... What makes them bad is that they give no warning of an attack, its calm then oh crap where's the super glue) 2.Dachshund (bitten in hand and arm shows aggression and can twist like a damn pretzle to bite) 3.Pug (......Insane) I've groomed Pitts, Rotts, Hybrids, Dobes, Shar-pei's, Huskies, Labs, Neufies, Bernards, Wolfhounds, and so on and never been bitten by any but the ones listed, and thats across the breeds, i was bitten by 6 different Corgies, there is only one that i will groom and its an angel, Weiners are mean as hell across the board, Pugs........ oh my god they are insane the only reason their only number three is because their jaws are so usless that they heven't been able to get to be but i've got scars from their claws. the other small breeds, (ie; Chiwa, Shiba-Inu, Yorkie, Shih-Tzu, etc) are fifty fifty some good some bad. but there you go, from someone who deals with animals every day