15 Reasons Why Your Dog Can Become Aggressive!

Dogs, like men, can sometimes exhibit aggressive behaviour. Find out what can explain such aggression.

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It is often said that dogs are excellent companions and with good reason. Indeed, these animals are extremely endearing, friendly and loyal. However, dogs can also be aggressive like any other animal. In fact, you may have already witnessed aggressive behaviour from your dog. Although this may be worrying, the first thing to do is to quickly identify the cause of this aggression. Knowing the source of aggression will help you find the best options to correct this unwanted behaviour.

15. Disease

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Some diseases can cause aggressiveness in dogs. If your dog likes to walk with other dogs, but his behaviour suddenly changes to become aggressive, he may have a serious illness. It is better, in this case, to go to the vet to make sure everything is correct.

14. Injury

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Pain is a particularly common cause of aggression in dogs. Your dog can suddenly become aggressive due to an injury that causes him major discomfort. Possible causes of pain include arthritis, bone fractures, internal injuries and lacerations.

13. Frustration

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When a dog cannot do what it wants or is forced to do what it does not want, it can become frustrating and aggressive towards the animal or the nearest person. In dogs, examples of frustration-aggression include aggression resulting from being physically restrained by their collar or locked in a kennel.

12. Protection

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Dogs can become aggressive when they are hyper-vigilant on their perceived territory. It is therefore not a question of protective behaviour with the family and the home, but of territorial protection.

11. Aggressive on a leash

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Is your dog-friendly most of the time? If your dog starts barking or trying to bite everything he sees as soon as you hold him on a leash, it’s probably because he feels too restrained by his leash. His aggressiveness is therefore redirected to the other dogs.

10. Social aggressiveness

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When several dogs coexist, they manage to establish a hierarchy in their group. This hierarchy system allows the pack to establish a social order for certain things (for example, who will get the most comfortable place to take a nap or who is the first to eat). When a member of the lower pack disrupts the established order, the alpha dog can correct it by a display of aggression in the form of a growl or jaw snap.

9. Establishment of a dominant position

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Dogs sometimes use aggression to establish their position of domination. This is more commonly directed to other dogs, but it can also happen to people.

Dogs that exhibit this type of aggression feel they have to prove that they are in charge of a situation. Dogs will be aggressive when they feel that their position is being questioned.

8. Anxiety

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Recent changes in a dog’s environment can make him anxious and lead him to adopt aggressive behaviours. Anxiety can be caused by the arrival of a new family member or moving to a new home.

7. Appropriation of objects

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Dogs can also be aggressive when it comes to their possession (for example, their favourite toy). They can, therefore, attack other dogs if they get too close to their favourite object.

6. Fear

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Fear is the most common reason why dogs behave aggressively toward other dogs. Fear-based behaviour is often the result of a lack of socialization, past negative experiences with other dogs or abuse by former owners. Usually, a dog will only exhibit aggressive fear-based behaviour if it feels in danger and needs to defend itself.

5. Redirected aggressiveness

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Redirected aggression occurs when a dog is excited by a stimulus (such as a bell or a dog outside the window) and does not have the ability to direct its aggressiveness towards that stimulus. He will then get angry with another dog or its owner.

4. Genetic predisposition

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Some dogs are genetically predisposed to aggression. Dogs of any breed can be selectively bred for intentional or unintentional aggression.

3. Protective assault

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This happens most often when a mother protects her young puppies.

2. Territorial aggressiveness

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Dogs may attempt to guard or defend their home or space. Territorial aggression includes barking and bumping into fences or windows.

1. Predatory assault

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Motivated by an animal’s desire to hunt and consume food. Often, predatory behaviour is observed in dogs that chase small dogs, cats or even young children.