|Ok, first of all, lets be real...OK! Rottweilers,American Pitbull Terriers, American Staffordshire Terrier, Staffordshire Bull Terriers, Dobies, German Shepards, Caucasian Mountain Dogs,Japanese Tosa etc. Where specifically bred to be a.) Protection Dogs and/or b.) Fighting Dogs (aka "sport" dogs). It is SPECIFICALLY said in their breed descriptions anywhere. Modify it how you want....dog fighting WAS a legal and highly participated sport in Europe and this is what these dogs were bred to do, be bigger, stronger, better protection and fight dogs. Cuddly as they may be...and as friendly and happy as your dog is now please trust...if you were to begin to instill this training your dog would have no problem catching on, because that's what it engineered for, otherwise everything would be a golden retriever, yorkie, etc. Every Purebred breed of dog out there, AKC, UKC, Rare Breed, was bred to perform a specific task in life. However since dog fighting has become illegal and the population has become more urbanized and we no longer have a need to hunt, or fight dogs in an effort relieve frustration from war(which is the reason the whole concept of dog fighting was thought of by a samurai leader) , all breeds of dogs have somewhat estranged from their once true calling, and settled into the life of being a content house-dog, using outlets such as fly-ball, obedience (basic & advanced), schutzhund, etc. to appease their instinct to perform a life calling task. As to the comments above, 1.) Dogs are dogs and are going to be aggressive towards each other to establish dominance either in silence with language we cant begin to understand or with language we do (fighting, biting). Your dog got bitten, ok what kind of situation was it? what was your dog doing? knowing small dogs im going to guess yipping like he was the baddest.....so, what if another small dog had bitten him? would you be predjudice against all other small dogs of that breed? and ultimately including your own; being a small dog himself? Think about that.
2.) All dogs have teeth and can and will bite, depending upon their PERSONALITY all dogs have their own personality, don't ignore it, I have had an 80 pound AMstaff be gentle while putting a catheter in than a 5 pound yorkie who will growl,bark and bite with an intent to kill you if their size didn't compromise them.
3.) It is OK to have a dog Personal Protection Trained, the thing about it is that the key word is TRAINING it is CONTROLLED aggression that requires the dog to absolutely listen to you and you must know what situations to put your dog in because STUPID people will come up and attempt to pet your dog WITHOUT ASKING which no one should ever do no matter how "friendly" the dog looks, make a sudden movement or move in a suspicious way and then want to look at you crazy when the dog bites them. So when your dog does have P.P. or Shutzhund training you must be trained along with the dog. VS. all out crazy VICIOUSNESS toward anything that moves, caused be a novice owner that got some tips online like this idjit above who started this whole mess and this idjit who gave him a nonsense training method, with this tactic you can and WILL have a lawsuit on your hands and loose your dog and quite a bit of money and I hope you do.
4.) The dog is a mirror reflection of the owners inner-self, no matter what you say, that dogs actions, behaviors, etc. come from what it interprets from you and you behaviors and actions.
5.) Please don't try to divert the hate onto other breeds like CH, that's reverse persecution and your not helping anything.
6.) All "controversial breed" dog owners have common ground, we have a dog we love and respect enough to train it and provide a good sound home for and people with misconceptions and hatred in their hearts for one dog in the past are trying to take them away from us, and you are helping them by using backyard training methods and old wives tales. If you want to TRAIN do it responsibly and with a PROFESSIONAL trainer because you need to be trained too. Don't ask your dog to do anything you wouldn't want to do and enjoy doing it. REMEMBER the BASIS of training is the dog has to enjoy what it's doing out of fun, not fear. Respect your dog and you are a Respectable owner.