Properly trained and socialized,and without being intruded upon or threatened,no dog breed is dangerous outright.Not even the Wolfdog(Wolf hybrid dog).
However when threatened,the following dog breeds are the top 12 most dangerous breeds.
The American Bull Terrier
Small to Medium sized dogs.Height at the withers from 17 inches to 22 inches for the tallest dogs.Weights from 13 kg to 30 kg.Much smaller than say the Alsatian for purposes of comparison.
Yet they must be the most lethal Dogs presently.
Ironically they are all capable of being extremely friendly to strangers.American Pitt Bull Terrier is used as anti Police attack Dogs and to guard drugs in U.S.A.
Also of the four below,the American Pitt Bull Terrier is banned out right in many countries including U.K.
The cousins are:
-The American Staffordshire Bull Terrier
-The Staffordshire Bull terrier
-The Miniature Bull terrier
All are not as dangerous as the American Pitt Bull.
Perro de Presa Canario
A large Mean Dog!Larger than a Rottweiler.Weighs 40kg-54kg for the females,45kg-64 kg for the males.Height is 22 inches -25 inches for females at the shoulder(withers) and 23 inches-26 inches for males.
It is said that there is no hope of survival if one is attacked by this breed.
It is therefore of utmost importance that one only goes near this breed when the owner is present.
The owner must also be authoritative enough to control the Breed.
This dog is from The Canary Islands.
Sarabis, Iranian Mastiff
Tosa Inu, Japanese
Bully Kuta, Pakistan
Gull Terr, Pakistan
Gull Dong, Pakistan
Bull Mastiff, English
Cane Corso – A bandogge
There are several other dangerous breeds,The Rottweiler for one is quite dangerous and as a guard dog is great.Has recorded almost as many bites as the American Bull Terrier.
The Rhodesian Ridgeback, Alsatian, Dobberman, Caucasian Shepherd, Wolfdog, Dalmatian, Boxer, Chow Chow, Malamute, Husky and American Bull dog are all also mean breeds.