Top 10 aggereesive dog 

Bull Terrier: The Bull Terrier is a breed of dog in the terrier family. There is also a miniature version of this breed which is officially known as the Miniature Bull Terrier.

Chihuahua: The Chihuahua is the smallest breed of dog and is named for the state of Chihuahua in Mexico.

Chow Chow: The Chow Chow is a dog breed originally from northern China, where it is referred to as Songshi Quan, which means "puffy-lion dog".

Dachshund: The Dachshund is a short-legged, long-bodied, hound-type dog breed with floppy ears, and short fur. Although, this Dog. 

Doberman Pinscher: The Doberman Pinscher, or Dobermann, or Doberman, is a medium-large breed of domestic dog originally developed around 1890 by Karl Friedrich Louis Dobermann.

Dogo Argentino: The Dogo Argentino, also known as the Argentine Mastiff, is a large, white, muscular dog that was developed in Argentina primarily for the purpose of big-game hunting.

German Shepherd: The German Shepherd is a breed of medium to large-sized working dog that originated in Germany. 

Rottweiler: The Rottweiler is a breed of domestic dog, regarded as medium-to-large or large.

Miniature Pinscher: The Miniature Pinscher is a small breed of dog originating from Germany. 

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American Pit Bull Terrier: The American Pit Bull Terrier is a dog breed. It is a medium-sized, solidly-built, short-haired dog whose early ancestors came from the British Isles.