Top 10 World Most Aggressive Dogs

  1. Bull Mastiff

The Bullmastiff is a large-sized breed of domestic dog, with a solid build and a short muzzle. It shares the characteristics of molosser dogs, and was originally developed by 19th-century gamekeepers to guard estates.

The breed’s bloodlines are drawn from the English Mastiff and the extinct Old English Bulldog.

It was recognized as a purebred dog by the English Kennel Club in 1924.

They are quiet dogs and very rarely bark.

Dogs of this breed are natural guardians of their home and owners. No special guard training is needed for a Bullmastiff to react appropriately if its family is endangered.

During training, a Bullmastiff requires a special approach, because these dogs do not like to repeat the same actions again and again.

  1. Tosa Inu

The Tosa or Japanese Mastiff is a breed of dog of Japanese origin that is considered rare.

It was originally bred in Tosa (present day Kōchi) as a fighting dog and still is today.

The Tosa varies considerably in size, with the Japanese-bred dogs tending to be about half the size of those bred outside the country.

The Japanese breed generally weighs between 36 and 61 kilograms (80 and 135 lb), while the non-Japanese breeders have focused on dogs that weigh from 60 to 90 kg (130 to 200 lb) and stand 62 to 82 cm (24 to 32 in) at the withers.

The coat is characterized by its short and smooth appearance and is often red, brindle, or fawn. Occasionally it can be a dull black, but this is somewhat rare. Maintenance of the coat is usually minimal.

Ownership of Tosas is legally restricted in certain jurisdictions. In the United Kingdom and Republic of Ireland ownership is regulated under the Dangerous Dogs Act 1991, and in Trinidad & Tobago under the Dangerous Dogs Act 2000.

Some insurance companies will not insure homes with dog breeds deemed dangerous

The Tosa is one of eleven breeds of dog banned in 2007 by the Dublin City Council from their properties, including council houses, flats and estates.