
Chickens are social creatures that live together in flocks, and like many social animals, they have a pecking order. This term was coined in 1921 by Norwegian zoologist Thorleif Schjelderup-Ebbe, who studied dominance and hierarchies by observing domestic chickens. The 'pecking order' is established through chickens pecking each other to achieve the top spot. This behaviour can sometimes be aggressive, and chickens may peck each other to draw blood. Chickens also display their status by perching on top of each other, which makes them feel safer and allows them to 'lord it over the other birds'.
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What You'll Learn

Dominance and hierarchies
Chickens, like many other animals, have a social hierarchy. This is often referred to as a "pecking order". The term "pecking order" comes from the behaviour of chickens, which will peck at each other to establish their place in the hierarchy. This behaviour can become aggressive, with chickens pecking at each other's feathers, or even drawing blood.
Within a flock, there will usually be one or two "boss hens" who rule the roost. These hens will be dominant over the other chickens, and the other chickens will accept their place below them in the pecking order. When a new hen is added to the flock, there may be a period of disruption to the pecking order as the new hen establishes her place in the hierarchy.
Chickens will also try to establish a pecking order with other species, including humans. This can be seen when a chicken perches on a human's back or head. The chicken may be trying to assert dominance over the human, or it may be a sign of affection, as the chicken feels comfortable with the human. However, it is important to remember that chickens are not always aggressive when trying to establish dominance, and they may simply be seeking a higher perch to feel safer.
In addition to pecking, chickens may also try to step on or stand on another chicken to assert dominance. This behaviour can be seen as part of the establishment of the pecking order within the flock. The chicken doing the stepping may be trying to physically dominate the other chicken, or it may be a result of the chicken's natural behaviour to roost as high as possible. In some cases, this can lead to injury, with the chicken on the bottom sustaining tendon damage from the pressure of the other chicken.
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Aggression and bullying
Chickens are social animals that live in flocks with a specific pecking order. This pecking order is established early in a flock's life and is continuously reinforced through subtle and sometimes aggressive interactions. Dominant hens often exert their dominance by pecking or chasing other hens away from food or prime roosting spots. This can lead to bullying, with dominant hens preventing lower-ranking chickens from accessing food and water.
Bullying behaviour in chickens can be identified by observing if a specific bird is being excluded or if there are frequent loud, distressed screeches from the flock. If a chicken is being repeatedly attacked or chased, it may vocalize its distress, indicating that bullying is occurring. Overcrowding is one of the top causes of aggressive behaviour in chickens, as they are easily stressed, especially when moving to a new home.
To prevent bullying, it is important to ensure that each chicken has adequate space, food, and enrichment. In addition, setting up multiple feeding and watering stations throughout the run and coop can help reduce competition and allow all chickens to eat without fear. If a specific hen is consistently aggressive, despite having enough resources, temporary isolation may be necessary to reset her status in the pecking order and reduce her aggressive behaviour.
In some cases, applying anti-pecking spray to targeted birds may be necessary to deter pecking. If a hen remains excessively aggressive despite these efforts, rehoming her may be the best option to maintain peace in the flock. It is important to note that permanent isolation of a bullied hen is not recommended as it would reduce her quality of life due to the social nature of chickens.
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Stress and discomfort
Chickens trying to step on other chickens can be a result of stress and discomfort. Stress and discomfort in chickens can be caused by various factors, including environmental changes, illness, injury, or social dynamics within the flock.
Environmental factors such as inadequate living conditions, extreme temperatures, or the presence of predators can cause stress in chickens. For example, ensuring sufficient space, food, and water for each bird is critical to reducing stress levels and maintaining peace within the flock. Additionally, introducing a new hen to the group may cause temporary uneasiness until a new pecking order is established.
Illness and injury can also lead to stress and discomfort in chickens. Chickens may exhibit specific behaviours or physical symptoms when they are unwell. For instance, a chicken standing on one leg might be giving one foot a rest, but it could also indicate a sore foot or an injury. Other signs of illness include droopy eyes, a droopy comb, slow movement, and dehydration. Identifying and treating illnesses and injuries promptly can help alleviate stress and discomfort in chickens.
Furthermore, social dynamics within the flock can be a source of stress and discomfort. Chickens establish a pecking order, with dominant "boss hens" ruling the roost. While this usually leads to peaceful coexistence once established, introducing new chickens or changes in the pecking order can cause aggression and bullying within the flock. Chickens may gang up on a specific chicken, causing injury or feather loss. In such cases, separating the bullied chicken or the aggressor and pairing them with gentler flock members can help alleviate stress and aggression.
Additionally, chickens may exhibit aggressive behaviour due to external stressors, such as bugs or lice infestations. Excessive itching may indicate the presence of such infestations, causing discomfort and distress in the affected chickens.
Identifying and addressing the specific causes of stress and discomfort in chickens is essential for their overall health and well-being. By providing optimal living conditions, promptly addressing illnesses and injuries, and carefully managing social dynamics, chicken owners can help reduce stress and improve the comfort levels of their flock.
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Submission and respect
The behaviour you are describing is indicative of what is known as the "pecking order" in chickens. The term was coined in 1921 by Norwegian zoologist Thorleif Schjelderup-Ebbe, who studied dominance and hierarchies in domestic chickens. The pecking order is a social hierarchy that establishes dominance and submission within a flock. It is a way for chickens to determine which bird is the leader, or "alpha".
The alpha chicken is at the top of the pecking order and is respected by the other chickens. This alpha chicken will make sure that older members of the flock accept new members without giving up its spot. It will also break up chicken quarrels, protect smaller chickens, and warn the flock of any possible danger. The alpha chicken is not necessarily the largest bird, but rather the one with the strongest personality and willingness to stand its ground.
The chickens lower in the pecking order submit to the alpha chicken and respect its position as the leader of the flock. This submission is important for maintaining peace and order within the flock. Without a rooster to protect and monitor the flock, the alpha hen takes on the responsibility of keeping the group safe and cohesive.
When a new hen is added to the flock, there may be a period of uneasiness as the pecking order is re-established. During this time, the chickens may peck at each other to assert dominance and determine who is higher in the pecking order. Once the new hierarchy is established, the birds usually live together peacefully. However, it is important to ensure that all the chickens' basic needs are met, such as adequate space, food, and water, to minimise aggression and maintain a stable pecking order.
In conclusion, the behaviour of one chicken trying to step on another is a display of dominance and submission within the pecking order. The chickens are determining their social hierarchy and establishing which bird is the leader, or alpha. This process is important for maintaining order and cohesion within the flock, and the alpha chicken is respected and submitted to by the other members of the group.
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Integration of new chickens
Chickens are territorial creatures of habit, and introducing new hens too quickly, without proper space or supplies, can result in injured, stressed-out hens, or worse. Therefore, integrating new chickens into an existing flock is a delicate process that requires the right steps and patience.
Firstly, it is important to quarantine new adult birds for at least 30 days before introducing them to the flock. This will help prevent the spread of diseases, which can spread fast in a flock. During this period, watch out for signs of distress among the new chickens, such as excessive squawking or hiding. It is also important to offer high-quality chicken feed to both the existing flock and the new birds.
Once the new chickens have been quarantined, the next step is to introduce them to the existing flock. This can be done in several ways, depending on the setup. If there is a free-range setup, the new chickens can be allowed to roam along with the old flock, while carefully observing their interactions. If they are getting along, they can be allowed to roost together. However, if there are safety concerns, a separate roosting space can be set up near the coop for a few days.
If there is no free-range setup, a separate chicken run or tractor can be used to introduce the new chickens to the existing flock. The new chickens can be placed in the tractor or run, which is set up next to the existing coop, allowing the two groups to observe each other for a few days before attempting to let them roost together. Alternatively, a large pet cage or carrier can be used, or a space can be set up inside the existing run with chicken wire.
Introducing new chickens at night can also help to reduce stress and aggression, as the chickens cannot see each other in the dark and are more likely to be in a resting state. This allows them to settle in without the chaos that can happen during daytime introductions. However, it is important to monitor their behavior in the morning, as there may be minor tiffs or even a big blowout. If the chickens cannot get along, the new ones should be separated and placed back in their enclosure to keep them safe.
During the early days of integration, providing distractions such as treats or new toys can help keep the birds occupied and reduce tension. It is also important to ensure that there is enough space for all the chickens, with a minimum of 4 square feet indoors and 10 square feet outdoors per bird.
Finally, remember that the process of integrating new chickens can take up to several weeks, so don't rush it. Be prepared to separate the new chickens again if there is excessive pecking or bullying, as chickens need time to adjust before being fully integrated.
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Frequently asked questions
This behaviour is known as the "pecking order", a term that dates back to 1921 when a Norwegian zoologist, Thorleif Schjelderup-Ebbe, studied dominance and hierarchies in domestic chickens. Chickens will peck each other to achieve the top spot and assert dominance.
While people often assume that the largest chicken will be the alpha, this is not always the case. A chicken's position in the pecking order is determined by its personality and willingness to stand its ground.
Firstly, try to identify any stressors that may be causing the aggressive behaviour. Common stressors include inadequate food or water, extreme temperatures, predators, or other external factors. Once the stressor has been removed, the behaviour may diminish. If the issue persists, you may need to separate the chickens by building a second coop or trading one of the chickens with another owner.
Chickens may exhibit certain behaviours that indicate stress or other health issues. For example, a chicken that is puffed up and tucking its head down may be trying to stay warm. Excessive itching may be a sign of a bug infestation, while jerking movements may indicate a sour or compacted crop.











































