5 Reasons Why Dogs Behave Aggressively

It is natural for a dog to show anger by revealing his/her teeth and growling. Sometimes, it might also become very difficult for owners to handle the symptoms of anger shown by their dog.

Now, if you were wondering whether this behaviour is shown only by angry breeds, then let us tell you that you’re highly mistaken, since calm breeds, like golden retrievers, show symptoms of aggression too.

But the question here is, why some dogs behave aggressively whereas others don’t? What issues lead to aggression in dogs and how can these be handled in the best manner possible?

In order to deal with these aggression issues in an effective manner, it is vital that you know the root cause of it. If you know the reasons that are causing your dog to behave aggressively, you can find a way around it and put a stop to the aggressive behaviour shown by your dog.

If you wish to know what causes a dog to behave aggressively, then read along the five factors mentioned below.


Your dog may behave aggressively based on a wide range of illness. For example, if your happy and calm dog suddenly starts to act all aggressive like biting or growling, it might be due to a sickness or an underlying disease.

Also, one of the most common causes that contributes to aggression in a dog is pain. Your pooch may start acting aggressive perhaps because of thyroid, brain tumor or any other disease. Therefore, it is very important for you to talk to your vet regarding the cause of aggression in your dog.


Fear contributes considerably to the aggressive behaviour of dogs every now and then. A dog usually behaves in an aggressive manner when it believes that he/she is in danger and has to defend itself against it.

Your canine tends to act this way, especially when he/she is cornered with no escape or when they realise that someone is about to hit them. A dog will bite only if they feel that they are threatened and there is no way out except causing harm to the one standing against them. So, be careful and make sure your approach is friendly when you go near a frightened dog.

Possession aggression

An aggression of such kind is shown by showing possessiveness for a belonging like a toy, food or treat. A dog will show possession aggression when someone tries to take away the chew toy they are playing with or their food from his or her bowl. In certain cases, however, a dog may even bite an unknown person who enters the house.

The way a pooch shows possession aggression may differ from one dog to another and can be expressed very differently. For example, a dog will not react when you sit near them and keep on chewing their toy. But it might behave differently when you are sitting close enough, especially when they are eating food.


In some cases, frustration can be a cause of aggression in a dog. This kind of aggression is judged as a barrier frustration or redirected aggression. Moreover, when a dog is not able to get something that they want, this aggression is triggered within them. And the inability is expressed by the form of frustration.

For example, a dog is tied up in the backyard and it tries to meet the other dog across the street. The entire day, it will bark and growl until it can’t take it anymore. And if the owner unties that dog at the end of the day, he/she will show its frustration by biting the owner.

Frustration is a common behaviour amongst dogs who spend a lot of time being leashed, tied up and confined to a small place.

If your dog is showing any of the above-mentioned symptoms, you will have to show that you care about them. Start this with small-small things. Take out 15-30 mins of your day and play with them, take them for regular walks, offer delicious treats and give them a trim using quality pet clippers.

Show your love to them by putting efforts in these things daily and their aggressive behaviour will surely be put to an end. Of course, this will not happen overnight, but you will definitely notice changes in their behaviour.