You have some gall Sig, why would you say "the only difference is that they may not kill" referring to Chihuahuas.
My point being that aggression is still aggression. Another point is that since the wounds can be minimal with such a small dog as a Chihuahua, that is one reason why people tend to ignore the aggression of the animal and think it's no big deal. When that lady's dog bit me, she happend to mentioned that it wasn't a big deal and it happens all the time. Personally, if any dog that I own shows aggression towards a human, it will be dealt with and that behavior will not be tolerated. Gets back to the irresponsible pet owners. Personally, I'd not only like to punt the dog, but the owner as well.
Like Bird kind of said, why would you want to own these if you are a responsible person?
Did you read my response to Bird as to why I have a terrier?
Read up on the breed. They actually do make good pets in the hands of responsible pet owners.
Are you inlcuding dobermans and others as well, or only the Terrier breed?
From your link
Hernandez testified that he had no idea his animals were capable of such brutality. He admitted none of his animals had ever been seen by a veterinarian and hadn't been vaccinated.
Number one, since none of his animals have NEVER been seen by a vet, I going to haphazzard a guess and say he probably is a irresponsible pet owner to begin with. Rabies vac should at least be the minimum for any dog, and the department of health would have that on file with whoever admin the shot. I say with sarcasim that a dogs owner would never lie as to the behavior of their pet when it comes to court. It is however hard to lie against a paperwork trail.
I'd also wonder how much socialization the animals actually had with humans due to their caged captivity (perhaps I missed that in the link). General rule of thumb with ANY dog is that if chained or caged during most of the day without interaction, the "shorter" the fuse of dynamite per your anology.
Personally, I'd find Hernandez guilty, and I would hope that he'd never have the chance to own another dog, period. However, I doubt that is, or will be the case.