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5 most aggressive dog breeds

Why would you want to know about the most aggressive dog breeds? Perhaps you are looking for a dog for personal protection? Or maybe you need a guard dog for your premises? Or it could be that you just want to know about the dog breeds to be wary of. All of these are valid reasons to find out more about the most aggressive dog breeds.

Of course, there is the line of thought that dogs are not naturally aggressive - they are made aggressive in the way they are brought up and trained. While this may be true for some breeds, for example the pit bull terrier, there is no doubt that certain breeds are innately aggressive. The aggression comes from their breed role. Even as puppies, they start to show aggressive tendencies from as young as 8 weeks!

Surprisingly, the most aggressive dog breeds in most lists include small breeds such as the Chihuahua, the Dachshund, and the Jack Russel Terrier. These small breeds seem to be innately defensive, and will bark at the slightest provocation, and even try to nip your ankle! But their sheer size makes them unlikely to cause a serious injury. In this page about aggressive dog breeds, I have concentrated on the breeds that are potentially aggressive AND potentially dangerous.

So, which are the 5 most aggressive dog breeds? There are quite a few breeds that could fit into this category, and of course there will be some disagreement between breed owners and "experts" about the top 5. But here is our own personal list of the 5 most aggressive dog breeds.

5 Most Aggressive Dog Breeds

The Caucasian Shepherd Dog.

This breed must count in anyone's top 5 list. It has a magnificent and imposing appearance, with a long furry coat, perhaps looking like a big cuddly bear to those who don't know their dogs.

But the Caucasian Shepherd starts to display aggressive traits from as young as 8 weeks. The breed was developed to protect sheep and sheep farmer's families from other dogs, human bandits, wolves, and even bears. This breed does not seem to have any fear of anything. They will develop an idea of who their close family members are, become very protective of the "family", and then attack anything else, including your children's friends.

Most aggressive dog breedsCaucasian shepherd dog
most aggressive dog breedsCaucasian shepherd dog attacking

Read more about the Caucasian Shepherd HERE.


The Gull Terr

A Pakistani breed, large and very powerful, often weighing up to 90 lbs. This breed will protect all it's "family" members, even the family cat. It will usually not bother about intimidation, like barking, it will just attack. It is a confrontational breed, ready to challenge any other animal or human that is not in it's "family"

The Gull Terr was originally bred in Pakistan and India during the British Raj period. The British brought with them their English Bull Terriers, which interbred with the local dog-fighting breeds. The result is an almost pure white dog with permanently erect ears.

This breed is very intelligent, and can be trained, but the instinct is to fight.

aggressive dog breedsGull Terr

Read more about the Gull Terr HERE.


Doberman Pinscher

Widely regarded as one of the best guard dogs in the world, the Doberman was originally bred to protect it's owner, a german tax collector. This is a very athletic and agile breed, with an imposing appearance and intimidating bark.

However, the Doberman WILL bark at first, to warn the intruder, unlike the Caucasian Shepherd or the Gull Terr, who simply attack and go for the kill.

But if the Doberman decides to take action, it will generally get the better of any opponent.

Aggressive Dog BreedsDoberman Pinscher

Read more about the Doberman HERE.


Chow Chow

This comes as a surprise to may people, as the Chow Chow looks very cuddly and friendly. Also known as the "Lion Dog" because of it's shaggy mane, this breed has a unique blue tongue.

The Chow Chow is a medium-size dog, without the bulk and muscle of the Caucasian Shepherd Dog nor the intimidating stance of the Dobermann. But don't be fooled. This breed is very territorial, and will quickly become aggressive if it feels the "home" or "family members" may be threatened.

Aggressive dog breedsA Chow Chow

Read more about the Chow Chow at our special page HERE.


Japanese Tosa

Bred to fight, this breed is ready to fight at a moment's notice. It originated in Japan hundreds of years ago, but was smaller at that time than today's dogs. It was bred with Mastiffs, Bull dogs and Dobermans (to name but a few breeds) to increase it's strength, size, intelligence and aggression.

Dog fighting in Japan can be very profitable for the dog's owners. Usually the dog fights are closely controlled, with a the dogs being separated quickly if an injury occurs, and a vet on hand to treat the dogs if required.

Due to it's dog fighting history, the Japanese Tosa is banned in 9 countries, and many insurance companies will not insure the breed against attacking humans.

aggressive dog breedsJapanese Tosa

Read more about the Japanese Tosa HERE.


Other breeds that could have made our top 5 most aggressive dog breeds list.

1. Dogo Argentino - banned in 10 countries.

2. Boerboel - a South African breed

3. Rottweiler - the famous muscle-bound intimidator.

4. Akita Inu - the Spitz breed from Japan

5. Presa Canario - bred for fighting.

6. Gull Dong - A cross between the pure Gull Terr and the Bully Kutta (Pakistani Mastiff).


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