The World’s Most Aggressive Dog Breeds

Below you will find a list of what we think the world’s most aggressive dog breeds are complete with pictures…. With our ‘Most aggressive dog’ selection at the end… A lot of people have misconceptions when it comes to which are the worlds most aggressive dog breeds and which ones aren’t.

The most aggressive dog breeds generally exhibit behavior that’s meant to scare or intimidate other animals or people. You can tell if a particular breed has aggression issues by the way it acts. You should especially pay attention when you are selecting a puppy.  Is it the bully of the group, or quite shy and timid?

Don’t just look at a dog’s breed when selecting one. Even the gentlest of breeds can be violent ones, especially if they aren’t given enough socialization and training.  Did you know that the breeds that are more likely to bite are the ones people rarely think about – like the cuddly toy poodle or the Jack Russell Terrier?

So here is our list of the most aggressive dog breeds…….


  • Chow Chows are one-man dogs that be given to bite with no warning. They’re also a bit ferocious around unknowns, and can be quite tenacious fighters. So be sure to discipline this dog and set right from wrong, immediately.

1 Chow Chow wallpaper1 The Worlds Most Aggressive Dog Breeds

  • The Papillon is fiercely loyal of their owners – to a fault. They can be quite possessive and standoffish to strangers.

2 papillon wallpaper The Worlds Most Aggressive Dog Breeds

  • Old English Sheepdogs are very protective of their owners so they might be aggressive if anybody comes too close to their masters.

English sheepdogs The Worlds Most Aggressive Dog Breeds

  • A Llasa Apso often gets quite cranky around kids.

Lhasa Apso wallpapers The Worlds Most Aggressive Dog Breeds

  • Rottweilers are extremely protective of their masters and home so they also make great guard dogs.

Rottweiler wallpaper1 The Worlds Most Aggressive Dog Breeds

  • Chihuahuas aren’t too fond of kids so they also make it into our list of most aggressive dog breeds. They’d rather be with adults than play around with tots.

chihuahua wallpaper The Worlds Most Aggressive Dog Breeds

  • Toy Poodles bite people and other animals out of self defense. Unfortunately, ‘playing’ according to you may be perceived as a form of ‘attack’ to them.

toy poodle The Worlds Most Aggressive Dog Breeds

  • Dachshunds aren’t known for their patience and are quite quick to ‘snap’.

Dachshunds wallpaper The Worlds Most Aggressive Dog Breeds

  • Jack Russell Terriers are feisty creatures who require early training to prevent long-term biting and digging problems.

Jack Russell Terrier1 The Worlds Most Aggressive Dog Breeds

  • Giant Schnauzers are very dominant. They often challenge adults, particularly strangers.

giant schnauzer The Worlds Most Aggressive Dog Breeds

  • Cocker Spaniels often suffer from a dangerous genetic disease known as “rage syndrome.” This syndrome causes spontaneous violent action against not strangers, but even family members too. Many Spaniels have been put down because of this unwanted behavior. Check with the breeder to ensure your Spaniel is free from this dangerous dog disease.

cockerspaniel11 The Worlds Most Aggressive Dog Breeds

  • The Pekingese isn’t all that tolerant of strangers and can be aggressive little ‘ankle biters’.

Pekingese wallpaper The Worlds Most Aggressive Dog Breeds

  • The world’s most aggressive dog breed though has to be the Pit Bull Terrier though accounting for more mauling’s, injuries and even deaths to other animals and people.  They are the breed that is covered the most in the news when it comes to dog attacks.  Of course it is not usually the dogs fault when they do attack as it’s purely down to their own animal instincts,  but attacks can usually be put down to their irresponsible owners..  Athough pit bulls are ‘generally’ quite gentle and can make a well loved pet.

pitbull e12992450216561 The Worlds Most Aggressive Dog Breeds

Here’s a rundown of more breeds of dog that are typically gentle but can’t shake off their “bad dog” image.

  • Boxers are pretty good with kids. They are good watchdogs, but will only become aggressive
  • Bulldogs are very playful and gentle.
  • Great Danes, while considerable in size, happen to be kind and affectionate.
  • Mastiffs are especially quiet and docile.
  • German Shepherds are great with kids too. These are courageous, fiercely loyal dogs who, if trained properly, will be extremely gentle to family and guests.
  • Rottweilers are also capable of tenderness and affection. They have a bad rep, but if they trust you, you’ll never have to worry.

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99 Responses to “The World’s Most Aggressive Dog Breeds”

  1. When I first found out that Chow Chows can be quite aggressive, I was very surprised. To me, they seemed very cute and calm. Same thing for Llasa Apso. I had no clue they can be aggressive until I bought one for my girlfriend. It kept barking at me for no reason and one day I even got a small bite.
    Anyway, I also agree that pitbulls are the most dangerous dog breeds.
    Thanks for the post!

  2. I have a doberman, pit bull, lab, and min pin. The doberman will lick you to death, pit bull loves kids, lab a big baby smart as can be, however the min pin will be the first to bite, she rulls the other dogs. The pit has bit once. Two men pushed there way into my house. The pit did not react until one pushed my son, knocking him down. He attacked almost bit off the man’s arm. That was four years ago, nothing since. I’m on bloof thinners, and the pit never reacted when I cut my hand pealing potatoes, and there was alot of blood.

  3. Bottom line here dog lovers of all kinds. Love your dog BUT remember you MUST be the alpha. Dogs are pack animals & love them but do not treat them like people. I have a four year old Rottie/Mastif mix. It has been a bit of a fight, to prove “who is top dog”. But I win. Enjoy everyones opinions

  4. I own a rescue Pitt…He is very loyal to me, loves kids, loves small dogs, doesn’t mind guests in the house (licks them to death is the most aggression), is playful, and so on. I have been told that when no body’s home he will growl and bump his head against the window, but the thing is they are very protective of their territory, which in my neighborhood I don’t mind if he scares someone off I know that my house is protected. Besides that he knows that when I’m gone his duty is to protect the house, it is a command that I give him before I leave. Also like with ANY breed show fear or dislike and they sense it and will react as many breeds do. Pitts get a bad rap, because they are in the news a lot but the news doesn’t really take interest if it’s say a poodle, and some people LIE to the reporters and say it was a pitt, when they don’t even know what type of breed the attack dog truely was just to get their 15 seconds of fame and some people that own them make them fight and that is always on the news, but I ask you this WHEN do humans have to be responsible for what they teach their dog??? A lot of people with “questionable backgrounds” raise most common known aggressive breeds pitts, rots, doebermans to fight and those are the ones you mostly see on the news, and unfortunatly for the dog who is just doing what it was raised to do because they usually have an idiot for an owner, but they are the ones that suffer the most. It is all in how ANY dog is raised aggressive breed or not…don’t get me wrong Pitts are more territorial than some other breeds that I have owned, but the misconception is that people who have never owned a pitt automatically think that they are born aggressive and everyone automatically condemn the breed rather than the owner. I say ignorance is the problem, and that people should definitely research a breed before they ever think about being an owner. Training is the key for owner and dog.

  5. oh my god these doggies are so adorable…i want to take one of each home with me today :)

  6. I have a Rottie – BEST DOG EVER!!! Yes, they ARE protective, however, they are EXTREMELY passive – they are very “wait and see”. A knock at my door means an investigation, no barking – in fact, I’ve only heard my dog bark a handful of times. I also have a 10 year old son – I believe whole heartedly that Rotties are great companions for children SO LONG AS (like with every other dog) the child is taught respect for the animal. ALL dogs must undergo training – no questions – however, more people go to the hospital with small dog bites than they do with large dog bites. Daschunds and Chihuahuas tend to be most aggressive towards strangers, Cockers towards their owners (rage disorder). I wish we could educate the masses when it comes to large “scary” dogs …and they’d listen! I hate the propaganda posted by misguided groups who want to banish the Rotties, Shepherds, Pitties, and so on – by nature, they really are peaceful, wonderful dogs – idiots turn them into their stereotype.

  7. My sister has a pit. His name is google. He is the sweeties dog I have ever met. His best friend is my 10 year old niece. He is protetive of those he knows. When he meets new people he wants to smell you. Most time that’s all he wants then he leaves you alone. He is very smart. He knows I am not the one he should be playing with. He knows to lick the back of my hand or rub his nose on my leg to say hello to me. when he sees my bf he knows it’s time to play. He does love tug of war. He goes and gets his toy takes it to my bf when he’s ready to play. I’m a little sad because my sister may have to give him up because of him being an “aggressive” breed due to her moving….

  8. I have a miniature dachshund who is incredibly loving she is always on my daughters bed and hates to sleep without her, but she IS nervous. She will bark at everyone and chase them, but will never ever bite – I would put my life on it. It’s completely my fault for not socializing her properly as a puppy.
    I work in a nationwide pet shop, we get all kinds of breeds of dogs in, you name it I’ve seen it. In my area we get a lot of staffies and they’re wonderful dogs. The only reason they get a bad rep is cause they don’t LOOK cuddly like a fluffy Pomeranian or Shih-tzu!
    I can tell you now the most aggressive dogs we get in the shop are small breeds where owners (like myself sadly) treat them like babies and think because they’re not powerful they don’t need to be trained to stay calm.
    Staffies and Pitbulls are still dangerous because they’re status symbols for their power and stamina. If people stop using them like this it can be bred out, all dogs came from one place, all the lovely cuddly Shih-Tzu’s came from the same animal as the Great Dane!!
    And the idiot who said Dalmatians are aggressive needs their head fixed, I’ve had two and they’re completely amazing, couldn’t ask for better dogs.
    I’ve also lived with two rotties, they were scared of the bloody cats. I don’t think I ever heard them growl in 4 years.

  9. I used to have a Pitbull, he had to be put down due to health reasons. Kramer lived to be 13 years old,he was the most gentle, loving,docile dog I have ever known. We rescued him from a terrible home. He was 1 year old living in a crate that he couldn’t even stand up in, never taken outside to relieve himself, standing in his own urine and feces. He had open sores on his paws due to this and the skin that covered his nails was gone due to infection. When we first saw him he was a bit frightening looking. He was a red nose pit with amber eyes and the most massive head and cheek muscles I have ever seen on a dog. We had never owned a pit so we were a bit nervous and we already had a male Golden Retriever. We knew we were taking him home with us that day regardless. We had to rescue this poor animal. He didn’t know his name, he didn’t know any basic commands,and of course he went to the bathroom in his crate because he never had any other option. In 1 week he learned the basic commands, his name, and with a lot of bleach and paper towels I got him to stop relieving himself in a proper sized crate. He won the hearts of everyone who met him. People would just about beg us for him if we ever wanted to get rid of him, of course we knew that would never be the case. He and our Golden “Buddy” were good friends. This dog was strong beyond belief, His favorite game was tug of war and the bigger the man on the other end of a notted up bed sheet, the better. Kramer never lost a game of tug of war. He would end up pulling the man holding on to his sheet all around the house, and it would end with the man on the other end laughing in histerics. We will never forget this beautiful animal who we were lucky enough to find. My husband has his face tattooed on his heart, which is where he will remain forever….

  10. fisrt of all ,,, PITBULLS ARE NOT AGGRESIVE WHATSOEVER ! they are only agressive if the trainer trains them to fight . therefore you should NOT say they are the most vicios dogs ..
    Thank you,

  11. I have a two year old pit mix who is the sweetest thing in the world. there is not one person who has ever felt scared around her. To be honest my poodle/terrier mix dominates the house even though shes 1/3 my pits size. She was a rescue dog who for the first six months of her life was a stray. when i adopted her they had to lie and say they didnt know she was mixed with pit (they would have had to put her down, yes at 6 mnths old). I hate that these loving loyal dogs are getting such a bad rap for irresponsible and despicable owners who dont have the heart to train them for anything other then fighting. And articles like these dont help to reclassify pits as not aggressive dogs but dogs that unfortunately can have horrible owners. Oh and did you notice every pic of the dogs on this list were cute puppy pics other then the pit pic which was a big beautiful dog with a big spring leash and spiked choker chain of course if you put a pic like that ppl are gonna think one way about them. but i could show u so many more of my dog now, my previous pit, and my moms two pits of them loving on little dogs, babies, toddlers, and even people they dont know. so before u judge maybe you should take a better look behind the media.

  12. I have owned and bred pitbulls for many years and this breed gets a very bad rap. For a long time a dalmation was the number 1 dog to attack. It is only due to stupid people and the news that pitbulls are being crucified. Not one of my pits has ever been aggressive. I have raised my 2 children around my different pitbulls and never once questioned if they would attack them. It’s all about how you raise them. You can make any dog aggressive and attack people. It’s not just pits. I have a friend who is a mail carrier and he says he’s been attacked numerous times and it’s never been by a pit. Most of the time it’s Chihuahuas he has to worry about. He had to be rushed to the hospital after being attacked by a Chihuahua he wound up recieving over 30 stiches in his leg from the attack. I get up on my soap box when it comes to pitbulls because they are a good family dog and good dogs in general. If stupid people would stop training them to attack oter dogs and people and treat them right they might stand a chance.

  13. Pit Bulls are not aggressive dogs. They are loving and kind. It is the owner who make pit bulls aggressive. Pits have to be trained to be aggressive, they don’t come into the world being aggressive. We have a pit bull who is 1 yr old and weighs 80 pounds and is nothing but a big baby. He thinks he is a small dog, always want to sit on your lap. I wish the world would quit giving pit bulls a bad rep and put the blame where it belongs, on the owner.

  14. Ok, a few things here about “PIT BULLS.” Number one, if you are a pit bull owner then you need to be responsible!! Dont let them run loose to wear they have a chance to get into some mischief! We need to be responsible, not that they will attack but because if someone sees your pit running loose more than likely they will call the dog control and you have a big issue there! Number two, pit bulls do not have LOCK JAW! Thats a myth! No breed has lock jaw! You can look inside their mouth and their teeth are like anyother breed. There is no latch of any kind! Number three, Humans have 120 pounds of bite pressure, Domestic dogs have 320 lbs of pressure. A German Shepard, American Pit Bull Terrier (APBT) and Rottweiler were tested using a bite sleeve equipped with a specialized computer instrument. The APBT had the least amount of pressure of the 3 dogs tested. So enough with pit bulls having some extra strength in their jaws and that they lock. Again, if we keep our pits under our control then we will never have to worry about them getting into any mischief!

  15. Another thing, its difficult to say all the attacks that people say were pit bulls actually a lot of the attacks are not pit bulls. There are so many other dogs that look like a pit bull. So, it hard to get correct statistics on pit bull attacks.

  16. I have a Chow Chow and tonight he bit my husband twice and now my husband wants to get rid of him. I am wondering if there is no way to train him not to bite? My husband says a dog should NEVER bit its owner and he is worried that he may bite our 2 sons…I guess we are going to be saying bye bye to our Chow Chow.

  17. It never fails about pit owners, It’s always ” My pit loves everybody & everything” & “Has never bitten anyone.”

    Well thats great & hope it stays that way, but to say they aren”t aggressive is so far off the mark it compells for correction, Pits are BRED FOR AGGRESSION, period, does that mean they’re all blood thirsty & vicious ? Of course not but ALL dogs are of man made genetic breeding , this is a fact I’m surprised this site didn’t even bring that up…

  18. ItsyBitsyPibble 22. Jun, 2012 at 6:07 am

    Somewhere american pitbull terriers, american staffordshire terriers, staffordshire bull terriers, some other breeds and mutts that even distantly resemble the breeds above, are all labelled as ‘pit bulls’. That distorts the statistics.

  19. I have a 2 year old chow and he is the most amazing dog ive ever been around. Yes he protects my home when I’m sleeping or away but thats the whole reason I wanted him. Dogs bite because they are given a reason too. I wouldnt trade my baby for the world and it would kill me if I ever had to get rid of him because of statistics. He is the calmest, most loving dog ive ever been around. I socialized him when he was a puppy and thats what helped him to understand good people from bad, he’s never bitten anyone and I honestly don’t believe he ever will. Hes amazing with kids and I would trust him in a room full of children before I would trust most adults. I believe places should give you a 30 day probationary period on pets, if your pet attacks or hurts anyone for any reason then you have to go but if they see that youre dog is a lover then you can stay. I cant wait to own my home so I don’t have to worry about my family having to lose their dog.

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