7 Chicken Breeds With Most Aggressive Roosters To Watch Out

Many people love the idea of having a rooster as part of their chicken flock. The early morning crowing is so iconic of farm life that when allowed, chicken owners often want to experience it. 

But, roosters can be aggressive. This becomes problematic if you have children around; in some cases, it can be dangerous for kids and adults alike. 

In addition to the steps you can take to mellow out aggressive roosters, it also helps to know which chicken breeds tend to cultivate more aggressive roosters and which breeds tend to have more mellow roosters

What are the most aggressive rooster breeds? The most aggressive roosters are Malay, English Game, and Cornish Chickens. Game chicken breeds are bred for aggressive roosters and include 5 fighting roosters: Indian Game, Asil, Modern, American, and Oriental Game Roosters can be dangerous to be around. 

This will help you make a good decision when you add a rooster to your flock. 

7 Most Aggressive Chicken Breeds With Aggressive Roosters

Wild and game chicken breeds are more aggressive chicken breeds. Wilder chicken breeds are usually those breeds that are only recently domesticated and come from the jungles and forests of Asia. 

Chickens are still used to defending themselves and have not been domesticated for enough generations to breed a more mellow disposition. 

Game breeds are chicken breeds that have been specifically bred for hundreds of years for cockfighting. As a result, the more aggressive roosters have been bred to create aggressive breeds. 

Most Aggressive Chicken Breeds Aggressive Rating 1-5 (5 Most aggressive) Key Features
Malay  ✮✮✮✮✮ Biggest Rooster in the world
Old English Game ✮✮✮✮✮ Born to Fight
Cornish (Indian Game) ✮✮✮✮ Big Attitude
Asil (Aseel) ✮✮✮✮ Very Territorial
Modern Game ✮✮✮✮ Will Fight to the Death
American Game ✮✮✮✮ Wilder Bird
Oriental Game ✮✮✮✮ Fight upon Hatching
Thai Game Fowl ✮✮✮ Keen Intellect
Shamo ✮✮✮ Second Tallest Chicken
Saipan Jungle Fowl ✮✮✮ Used for Fighting
Red Jungle Fowl ✮✮✮ Very Independent
Sumatra ✮✮✮ Can Fly Far

1 . Malay Roosters 

Malay chickens were originally brought to England from India and Asia. They were bred to be cockfighting birds and so are generally very aggressive. They are perhaps the most aggressive breed of chickens, although the English Game can compete with them. 

Malay roosters are one of the biggest roosters in the world. In addition to being practically all muscle, they are also large. They easily stand 3 feet tall. They have a strong, stout beak and thick legs. This makes them tough in a fight. 

Malay roosters are bold and fearless. They can kill or harm chicks as they are not very friendly toward smaller chickens. They need plenty of space and can be aggressive toward other chickens, animals, and people.
It’s not uncommon for a Malay rooster to attack a cat or take on a dog. They literally have no fear of predators. 

Malay roosters that are kept together will fight to the death. They will not tolerate other Malay roosters in their territory. 

2. Old English Game Roosters

Old English Game Roosters are another breed that was bred specifically for cockfights. The Old English Game is a beautiful and colorful rooster with gorgeous feathers. 

But, don’t let this beautiful bird fool you. Roosters and hens are very aggressive and will not play nicely with other breeds of chickens. They should be kept separate from other chickens. Roosters won’t tolerate other roosters in the area and will fight until the other rooster leaves or dies. 

In addition to being aggressive toward other chickens and animals, Old English Game roosters will also be aggressive toward people. This includes adults and children alike. 

If you raise Old English Game chickens, make sure to allow them plenty of space. They don’t coop up very well. The mothers are great and protective moms and will hatch their own eggs. 

Roosters grow to only about 4 pounds and aren’t afraid of anything. They are a great rooster to protect the flock and aren’t afraid of a fight. They were born to fight! 

Old English Game Roosters are Mean

3. Cornish Chickens – Indian Game

Cornish chickens are the most used breed for meat chickens and are the mosft popular heritage meat chicken. The Cornish Cross comes from a cross between the Cornish Chicken and a Plymouth White Rock. 

Cornish chickens are aggressive. They were previously called the Indian Game chicken. They were first imported to England hundreds of years B.C. As the breed was developed in more recent years, breeders called them Cornish chickens to promote them as meat chickens while also calling them Indian Game when the cocks were used in cockfighting. 

They are very muscular birds with a big attitude. They are aggressive, although the hens aren’t as aggressive as the roosters. They need plenty of space and should be combined in flocks with other roosters. 

Chicks tend to be more aggressive than chicks from other breeds. You may notice feather pulling at only a couple of days old. They are also more likely to start cannibalism at a young age. 

4. Asil or Aseel Chickens

Asil chickens are the meanest chicken breed. Asil chickens were bred for cockfighting and are extremely territorial. Asil roosters are often called the “most fighting chicken in the world.” The roosters are very territorial. They should not be combined in flocks with other breeds. Chicks often start fighting before they reach a week old. Cocks should be separated by 3 months of age to prevent to-the-death fights. 

Hens are aggressive toward each other and can be very aggressive toward their human caretakers, but it isn’t always the case. Some Asil owners also claim that Asil chickens are very friendly to humans and are only aggressive toward other chickens and animals. Hens can become aggressive toward specific chicks, so if you raise Asil chicks, watch for aggression and separate the ones most at danger. Roosters will fight to the death. 

The Asil is stubborn, majestic, and has high stamina. The roosters will outlast most any threat that presents itself- that includes you! 

Asil chickens originated in India and were brought to Europe for the purpose of cockfighting. Centuries before they were introduced in Europe, they were bred in India for cockfighting so their aggressive nature is thousands of years old. 

Asil chickens should not be cooped up or kept in small places. They also do poorly in colder weather. There are several varieties of Asil chickens. Asil chickens also spelled Aseel or Asli, are aggressive, fighting chickens. 

5. Modern Game Chickens

Modern Game chickens descended from Old English Game and produced a brightly colored, fierce rooster. 

Roosters and hens can be aggressive and aren’t a great breed for new chicken owners, although they can be trained to be more mellow with experience. 

Modern Game roosters will fight other roosters to the death and shouldn’t be allowed or kept with other roosters. This usually happens even when cocks are raised from hatchlings together. Once the hormones kick in- it’s fighting time. 

They are very active roosters and require adequate space. They don’t do well in confinement but prefer to free-range. 

Modern Game chickens originate from a combination of Old English Game and Malay heritage. They are great show birds because of how colorful and bright their appearance is. They weren’t bred as a game bird, but still have much of the aggression of their ancestors inherent in the roosters and hens. They aren’t as aggressive as either Malay or Old English Game but are still considered a more aggressive breed. 

Modern Game roosters grow to about 6 pounds. 

Oxford Game Chickens are aggressive

6. American Game Chickens – Roundheads

American game chickens were bred for cockfighting. They are a territorial, aggressive bird. Both roosters and hens can be aggressive and should be kept from other varieties of chickens. This breed is a noisy chicken breed. 

Roosters will not tolerate other roosters in the flock and must be kept separate from other roosters to prevent death fighting. 

American Game is a more wild bird. They fly easier than other breeds like to roost in trees, and love free-ranging, although it can be hard to find the eggs.  

American Game hens will bully new hens and don’t like newbies in the flock. 

Although American Game is more aggressive, the roosters tend to be good fathers and aren’t as aggressive toward their own young.

American Game chickens have a rich history and were the breed that George Washington, Thomas Jefferson and Abraham Lincoln raised. 

American Game chickens are raised mainly as ornamental birds and come in nearly any color combination. They have long beautifully colored feathers and do well at chicken shows. 

American Game has many varieties including the nicknames Roundheads, Sweaters, Marsh Butchers, Bumblefoot Grey, and Whitehackles. All of these nicknames refer to a specific strain or coloring of American Game chickens. 

7. Oriental Game Chickens – Oriental Fowls – Jungle Fowl

Oriental game chickens and Oriental long-feathered chickens were also a fighting chicken bred for cockfights. They are also referred to as Oriental Fowls. Oriental game chickens can come in Vietnamese, Burmese, Thai, or other Asian varieties. You may also see them referred to as jungle fowl. 

They are possibly the most ancient of all breeds and the breed closest to the original wild chicken that was first domesticated thousands of years ago. 

As a result, Oriental Game chickens still have the fight to live instinct and are very wild. They fly well, roost in trees, and aren’t afraid to fight to the death. 

However, many of these breeds of chickens are rare and fighting extinction. 

Oriental Fowls are fierce and chicks will often fight immediately upon hatching. Even hens are aggressive, although they often mellow with age. The hens are great mothers and do well hatching and raising their young. 

Cocks should be kept separate as they will continually fight to the death. These athletic birds are very adept at taking care of themselves. They are muscular with thick, widespread legs. They are a cousin to the Asil Chicken. 

Other varieties of Oriental Fowl include: 

  • Thai Game Fowl: Still used for cockfighting in Thailand. It’s known for its intellect and quick reactions. 
  • Shamo: The second tallest chicken breed. A very aggressive bird that is also a protected species in Japan. 
  • Saipan Jungle Fowl: An upright chicken from the island of Saipan. It has been used for fighting and bred into larger breeds for competition. It’s not an accepted breed in the USA. 
  • Red Jungle Fowl: A chicken raised for its independence and as a food source. This chicken hasn’t been coddled by owners and has retained its original wilderness even though it’s been domesticated for a thousand years. 
  • Sumatra: This is the best flying chicken of all chickens, flying as far as 5 miles on the wind. They can jump up to 6 feet. Roosters are aggressive toward other roosters. This breed is fighting extinction.

Asian Fowls are aggressive

Egg-Laying Chickens Are Not Usually Mean

Most egg-laying chicken breeds are not aggressive chickens. Many breeders weed out aggressive animals from their breeding program which makes the lines less mean. Some egg-laying chicken breeds are more aggressive such as the Leghorn, Wyandotte, or the Rhode Island Red breeds. Among egg-laying chickens, these three breeds have more aggressive, mean roosters. But, compared to other fighting chicken breeds, even these three breeds are fairly calm. 

Are Australorp Roosters Aggressive? Australorp chickens are one of the most mellow chicken breeds around. Even the roosters tend to be friendly and non-aggressive. If mixed with other breeds, Australorp hens will generally be at the bottom of the pecking order and the roosters generally submit to other rooster breeds.

Are Leghorn Roosters Aggressive? Leghorns are one of the most aggressive roosters of the egg-laying chicken breeds. They are aggressive to other chicken breeds and can be mean to children. Leghorn hens develop larger wattles, and the roosters have large wattles and leg spurs that make an attack more painful. Even when gently raised from chicks, leghorn chickens will remain standoffish. 

Even so, they aren’t considered a super aggressive breed as there are very aggressive breeds usually not raised by chicken owners. 

Are Ameraucana Roosters Aggressive? Ameraucana roosters are not generally thought to be aggressive, but the breed can produce some aggressive individuals. Although Ameraucana roosters aren’t considered aggressive, they are generally a little more aggressive than some calmer breeds. 

Are Easter Egger Roosters Aggressive? Easter Egger chickens can be aggressive depending on their individual lines. Because Easter Egger chickens aren’t an actual breed, the roosters can have various temperaments depending on their genetics and heritage. Some Easter Egger chickens will be more aggressive, while others will be super mellow and calm. It completely depends on the variety of Easter Eggers you raise. Easter Eggers aren’t considered an actual breed so there isn’t a set standard or set of genetics that you can depend on. 

Are Silkie Roosters Aggressive? Most silkie roosters are friendly and non-aggressive toward humans. But, individual Silkie roosters may be more aggressive than their cuddly- teddy bear appearance would suggest. Silkie roosters can have a wide range of individual temperaments. As a general rule, Silkie chickens tend to be near the bottom of the pecking order and less aggressive with other chickens than most other breeds. 

Are Polish Roosters Aggressive? Polish chickens are never aggressive unless they have been very poorly treated; even then, they are more likely to run than to fight. They have an adorable tuft that makes it harder for them to see and respond to danger. As a result, the chickens tend to be less aggressive toward other chickens and are often the bullied chickens in a mixed flock. At the same time, the lack of peripheral vision can make roosters jumpy and nervous. This can occasionally translate into more skittish behavior but rarely aggressive behavior.

Frequently Asked Questions About Specific Breeds:

Are Bantam Roosters Aggressive? Most breeds of bantam chickens are not aggressive. Because of their smaller size, roosters are generally sweet and friendly. This can change a little during the mating seasons but won’t generally result in high aggression. In some cases, bantam rooster mixes can inherit meaner traits that cause them to pick on small children when they turn their backs on the rooster. It’s sort of the equivalent of “little man” syndrome in a rooster.  

Are Brahma Roosters Aggressive? Brahma chickens are not aggressive or mean. They are considered one of the calmest chicken breeds around. Even Brahma roosters have often been nicknamed “the gentle giant” because they have such calm, sweet personalities. Even though they are very large chickens, the roosters are usually mellow and friendly. 

Are Welsummer Roosters Aggressive? Welsummer roosters are not usually aggressive. Generally speaking, Welsummer roosters are mellow enough for most people and even kids. Of course, rough handling can create a defensive roo.

Are Serama Roosters Aggressive? Serama chickens are are rarely aggressive chickens, although the roosters may occasionally become aggressive with people. The smallest chicken breed in the world are usually calm and mellow chickens. In a mixed flock, Serama hens are often picked on by other breeds. 

Keep roosters separated unless they are raised together and even so, watch for signs of fighting and aggression once the roos reach puberty at 4 or 5 months of age. 

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Annemaria Duran

Hi, I’m Annemaria Duran. I moved out to the country 6 years ago, mainly so I could have more land. I love all aspects of country living. First, we got chickens, then ducks. Now we have sheep, goats, and rabbits. I'm always learning and love sharing it!

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