Sometimes dogs have behaviors that are not easily explained, or that can’t be simply understood. Pups can get aggressive when they see their owner leave, and start attacking furniture. It’s natural to ask yourself “Why does my dog attack the door when I leave” after seeing your scratched door.

Why Does My Dog Attack the Door When I Leave?

These are some of the reasons that explain the dog’s hyperactivity.

Territorial Aggression

Dogs are loyal, protective, and territorial. It’s normal for them to protect their place. They will bark, growl and even attack to protect their territory. This case happens when they notice a strange is near, provoking anxiety or fear, trying to make the intruder leave.

If the visitor stays in what the dog calls its territory, it may turn him more aggressive and more dangerous depending on the case.

Territorial displays can occur not only in the house (windows, doors, cars) but also outside since dogs quickly claim territory. Physical prevention like leashes or fences can increase the aggressiveness of the animal.

Separation Anxiety

Some dogs are used to being alone, but the truth is that most household puppies love their owner, and don’t like to be left unattended. When lonely, they tend to get destructive or disruptive by defecating, urinating, barking, or attacking furniture.

If you notice your dog getting anxious or nervous when you’re about to leave the house, this is an indication he’s suffering from separation anxiety. It’s important to address this problem since it can delve into escape attempts, household destruction, or dog self-harm.

Barrier Frustration/Aggression

Dogs develop frustration when they’re close to something they want to reach but it’s impossible to get to. This is provoked by any kind of fence, door, barrier, being inside a car, or leashes. The most common outcomes for this are barking, lunging, and increased aggressiveness.

It’s also easy to diagnose and fix this frustration. Pups that are very friendly toward others and love to socialize are the more prone to suffer it. Others want to meet new peers, but anxiety plus being leashed can cause it since it doesn’t let them act like a dog.

How to Stop It

There are many ways to prevent these behaviors from happening and to teach your dog how to behave properly.

Predictable Routines

One of the easier ways to keep your dog calm is by establishing predictable routines. Knowing when his owner will be outside, when are you coming home, playtime, and such help them to be prepared.

Scheduling toy play, naps, or time outdoors on the patio during this time you’re outside may become handy.

Training Classes

Many professionals provide training classes to help your dog deal with, and overcome this type of situation. You can also opt to get some training books and do it yourself, but it’s not as good as and recommended as professional training.

Give Your Dog Attention

It is not all about how to keep your dog calm when you’re outside. Make sure you give your pet the love they deserve when you’re home. Play, exercise, cuddle or pat them to ensure they have a good time.

You can establish daily routines for this, and all this physical effort will tire your dog, reducing the chances of being hyperactive when you’re not home.

Provide a Relaxing Spot

Sometimes, having a nice place or spot to relax will greatly help your dog. A small mattress or bed will do. They detect it as a secure area to settle while you’re outside. Luring or trying him to get into this place will take practice, and it’s important not to force it.

Encourage Independence

It’s vital not to encourage clingy behavior, since it won’t help at all with the training. Teach them to be in their room or place when you’re home, staying out of his line of sight for a while and playing it cool after you come back.

This doesn’t mean you can’t love your dog at all, it’s important to limit the emotions a bit. Do not punish them if they couldn’t behave while you were away.

Supervision and Monitoring

While it’s not possible for everyone if you have a camera inside your home you will be able to monitor your dog’s behavior while you're away. You can check whenever your dog starts attacking the door or any other furniture, and what triggers it.


When training and condition fail, you can try to appoint a visit to the vet. Sometimes your dog will have to take meds like antidepressives or pills to prevent anxiety and panic disorders. While they’re completely safe, be sure your vet prescribed them and you’re giving them the right dose.

Supplements and pheromones appeaser collars are other options your dog can take to ease their training or conduct.


When owners ask “why does my dog attack the door when I leave?”, it’s crucial to know that there are many factors affecting it. From anxiety to fear, dogs can get really aggressive or sad when they don't get the love or attention they think they need.

Through training and diligent practice, you will be able to make your dog calmer while you’re not home, ensuring he still has a good time alone.