BonniDune Kennel is located in
Southern Indiana, USA. Although I started
with German Shepherd Dogs, today BonniDune is
dedicated to showing, trialing and producing
sound, versatile Border Collies.
BonniDune is proud to be recognized as an AKC Breeder of Merit.

Puppies Born December 25, 2013

What Causes Border Collie Aggression


Border Collies are highly intelligent and energetic dogs known for their herding abilities. They are generally friendly and well-behaved, but like any breed, they can display aggressive behavior under certain circumstances. Understanding the causes of aggression in Border Collies is crucial for their proper training and socialization.


Genetics play a significant role in a dog’s behavior, including aggression. Some Border Collies may inherit aggressive tendencies from their parents or ancestors. Breeders should always prioritize temperament and select dogs with a stable and friendly disposition for breeding to minimize the risk of passing on aggression.

Lack of Socialization

Insufficient socialization during a Border Collie’s early developmental stage can contribute to aggression later in life. Properly introducing puppies to various people, animals, and environments helps them develop confidence and adaptability. Without adequate socialization, they may become fearful or anxious, leading to defensive aggression in certain situations.

Environmental Factors

The environment in which a Border Collie is raised can also influence their behavior. Dogs that are consistently exposed to stressful or chaotic situations, such as constant loud noises, violence, or neglect, may develop aggression as a coping mechanism. A stable and nurturing environment with positive reinforcement is crucial for a Border Collie’s mental well-being.

Frustration and Lack of Mental Stimulation

Border Collies have a high level of intelligence and energy, and they require mental and physical stimulation to prevent boredom and frustration. When these needs are not met, they can become restless and display aggressive behavior as a means of releasing pent-up energy. Sufficient exercise, training, and engaging activities are essential to keep a Border Collie’s mind stimulated and prevent behavioral issues.

Pain or Medical Conditions

Aggression can sometimes be a result of underlying pain or undiagnosed medical conditions. It is important to rule out any physical discomfort that might be causing the aggressive behavior. Regular veterinary check-ups and monitoring for signs of pain or illness are essential for maintaining a Border Collie’s overall health and well-being.

Possessiveness and Resource Guarding

Border Collies, like many other breeds, can display possessive behavior and resource guarding. This aggression is often triggered when they feel their belongings, such as toys, food, or living space, are being threatened or taken away. It is crucial to teach them proper boundaries and provide consistent training to prevent possessive aggression.


Understanding the causes of aggression in Border Collies is vital for their proper training and socialization. Genetics, lack of socialization, environmental factors, frustration, pain, and possessiveness are some of the potential triggers for aggressive behavior. By addressing these causes and providing a nurturing and stimulating environment, Border Collie owners can help their dogs become well-adjusted and friendly companions.

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