Defintion of vicious breeds of dogs?

No such thing as a vicious breed... it's all the owner who makes the dog. It's how it's raised and trained. Owner accounts for EVERYTHING.

Believe it or not the Chihuahua. Honest! More people get bitten by that breed than any other breed of dogs.

There is no vicious breed, only bad ownership. Yes, some breeds are naturally more aggressive than others but you can not lump all dogs into the "vicious" category just because they are the same breed. Just like identical twins only look identical and in fact do not act or think identical, dogs of the same breed have different temperment levels a lot of which is decided by the lifestyle they have lived and how they have been trained. It is because of people like you that so many states have breed-specific legislation banning and enforcing strict rules on breeds instead of enforcing stronger rules for more responsible owners!

ITS NOT THE DOG ITS THE OWNERno dog in its breed is mean its how the dog is raised my sister has 14 pittbulls and they all get along just fine and dandy and i have a dobermin rotty who was a rescued dog and he started out mean cuz he was beat but i turned him around and now he is a AMAZING house dog

It depends on the family or owner. If the family is bratty and mean the dog will be vicious. If the owner is mean the dog will be vicious. If the dog has an abusive family or owner the dog will be vicious towards other people. I know this cockapoo but the family gave her away. They were mean to this dog and also the family was mean too. At parties they put him in a room and it was dark with no water or food just the laundry room and locked the door. When people were over that dog bit everyone since he was abused and left out. So it really depends on the owner if the owner is mean or nice. If the owner is nice you will have a sweet gentle kind dog like mine Harry a male cockapoo who is the sweetest thing in the world. Since my family is sweet and I am sweet he is brought up to be sweet. I know a lot of bratty dogs because the family is bratty. It all depends on the family or owner it doesnt depend on the dog itself it can. If you get a dog who just came from an abusive unruly life where he was beaten or something. It all really depends on the family and owner. It can also depend on where he lives. If the dog has a small space to live in he/she would be vicious or mean. If the dog lives in a bad neighborhood he/she could be vicious or mean. I hope this supplies enough information towards your question and thank you!