Due to its aggressive nature, some state governments have even banned breeding of Pitbulls.
As a territorial animal, these can guard your home really well. Most owners of Rottweilers find them bit soft. But they can get aggressive if they are not trained right.
3. American Bandogge
This incredibly strong dog is a cross breed between an American Pit Bull Terrier and a Neapolitan Mastiff. In spite of its muscular look, the dog was not originally bred for fighting. Nevertheless, some have used it as fighting dog.
Although Huskies look puffy and soft, reports say that 15 people have died in the last 20 years because of them.
5. Doberman Pinscher
Though these dogs make great guard dogs, their bite and strength makes them a hazard, nonetheless, as evidenced by the attacks they have been involved in.
6. German Shepherds
These dogs can serve you loyal but when they are not treated well, they can be dangerous too.
7. Wolf-Dog Hybrid
With behavior traits that are difficult to predict, the wolf-dog has proven a danger to owners as well as other humans that come in contact with the breed.
8. Chow Chows
When they are not bred with proper attention, they easily turn aggressive.
9. Cane Corso
A muscular dog that typically bonds with its owner, this dog can occasionally become unruly as can any dog if poorly socialized or ill-treated.
10. Great Danes
If you fail to give the kind of attention it requires, it starts to rebel.
Also See: 9 Hilarious Dog Gifs That Will Make You ROFL!