Barrier aggression, also known as barrier frustration or barrier reactivity, describes a dog’s territorial behavior when placed behind a barricade such as a gate, screen, or fence. Barrier aggression behaviors include lunging and snarling at passersby. While some dog owners value these traits because they want their pet to help provide security around their property, some consider this type of dog aggression an unwanted behavior.
Dogs develop aggressive behaviors due to their territorial instincts and learned behaviors. When someone comes up to a fence line or kennel, the dog may instinctively lunge or bark to protect its area. When the person retreats, the dog learns that it can act aggressively to protect its space.
If you have a reactive dog who barks or attacks intruders, you can follow a behavior modification [training](https://www.masterclass.com/articles/dog-training-guide) regime to help improve impulse control and curb aggression. If you are struggling to train an aggressive dog, you can also seek help from a certified professional dog trainer.

1. __Prepare a reward__. Choose a high-value treat that your dog loves. Treats are a powerful [dog training tool](https://www.masterclass.com/articles/brandon-mcmillan-dog-training-tools) and serve as positive reinforcements.
2. __Go to a private fenced area__. Choose a location where you and your dog are alone, and your pet can safely be off-leash. Put your pet behind a fence, ideally one with holes or an opening so you can offer treats to your dog through the barrier. A chain-link fence is optimal for these training sessions.
3. __Provide a treat__. Begin by giving your dog a treat regardless of their behavior. Provide them with two or three [treats](https://www.masterclass.com/articles/homemade-dog-treats), so they understand you have something they want. 
4. __Wait for your dog to remain calm__. Wait and watch your dog to see if they remain calm. If they are calm after five seconds, give them a treat. If they act aggressively, turn and walk away. Repeat this multiple times, gradually increasing the amount of time you require them to remain calm.
Your dream of having a dog who understands words like “sit,” “stay,” “down,” and—crucially— “no” is just a [MasterClass Annual Membership](https://www.masterclass.com/) away. The only things you’ll need to train up a well-behaved pup are your laptop, a big bag of treats, and our exclusive instructional videos from superstar animal trainer Brandon McMillan. 
Barrier aggression is a dog behavior exhibited when you place your pet behind fences or gates. Learn how you can use counter-conditioning to curb your dog’s barrier frustration.

Barrier aggression is a dog behavior exhibited when you place your pet behind fences or gates. Learn how you can use counter-conditioning to curb your dog’s barrier frustration.

Barrier Aggression: How to Reduce Barrier Aggression in Dogs

Barrier aggression, also known as barrier frustration or barrier reactivity, describes a dog’s territorial behavior when placed behind a barricade such as a gate, screen, or fence. Barrier aggression behaviors include lunging and snarling at passersby. While some dog owners value these traits because they want their pet to help provide security around their property, some consider this type of dog aggression an unwanted behavior.

What Is Barrier Aggression in Dogs?

Dogs develop aggressive behaviors due to their territorial instincts and learned behaviors. When someone comes up to a fence line or kennel, the dog may instinctively lunge or bark to protect its area. When the person retreats, the dog learns that it can act aggressively to protect its space.

The Causes of Barrier Aggression in Dogs

If you have a reactive dog who barks or attacks intruders, you can follow a behavior modification <a href='https://www.masterclass.com/articles/dog-training-guide' target='_self' class='mc-text--link' data-mc-segment-trigger='true' data-mc-segment-event-type='Article Page Click' data-event-obj='{"textTag":"p","href":"https://www.masterclass.com/articles/dog-training-guide","linkCopy":"training","category":null}'>training</a> regime to help improve impulse control and curb aggression. If you are struggling to train an aggressive dog, you can also seek help from a certified professional dog trainer.<ol class="mc-m-4"><li class="mc-my-4"> 1. Prepare a reward. Choose a high-value treat that your dog loves. Treats are a powerful <a href='https://www.masterclass.com/articles/brandon-mcmillan-dog-training-tools' target='_self' class='mc-text--link' data-mc-segment-trigger='true' data-mc-segment-event-type='Article Page Click' data-event-obj='{"textTag":"p","href":"https://www.masterclass.com/articles/brandon-mcmillan-dog-training-tools","linkCopy":"dog training tool","category":null}'>dog training tool</a> and serve as positive reinforcements. </li><li class="mc-my-4"> 2. Go to a private fenced area. Choose a location where you and your dog are alone, and your pet can safely be off-leash. Put your pet behind a fence, ideally one with holes or an opening so you can offer treats to your dog through the barrier. A chain-link fence is optimal for these training sessions. </li><li class="mc-my-4"> 3. Provide a treat. Begin by giving your dog a treat regardless of their behavior. Provide them with two or three <a href='https://www.masterclass.com/articles/homemade-dog-treats' target='_self' class='mc-text--link' data-mc-segment-trigger='true' data-mc-segment-event-type='Article Page Click' data-event-obj='{"textTag":"p","href":"https://www.masterclass.com/articles/homemade-dog-treats","linkCopy":"treats","category":null}'>treats</a>, so they understand you have something they want. </li><li class="mc-my-4"> 4. Wait for your dog to remain calm. Wait and watch your dog to see if they remain calm. If they are calm after five seconds, give them a treat. If they act aggressively, turn and walk away. Repeat this multiple times, gradually increasing the amount of time you require them to remain calm. </li></ol>

How to Reduce Barrier Aggression in Dogs

Your dream of having a dog who understands words like “sit,” “stay,” “down,” and—crucially— “no” is just a <a href='https://www.masterclass.com/' target='_self' class='mc-text--link' data-mc-segment-trigger='true' data-mc-segment-event-type='Article Page Click' data-event-obj='{"textTag":"p","href":"https://www.masterclass.com/","linkCopy":"MasterClass Annual Membership","category":null}'>MasterClass Annual Membership</a> away. The only things you’ll need to train up a well-behaved pup are your laptop, a big bag of treats, and our exclusive instructional videos from superstar animal trainer Brandon McMillan.

Want to Learn More About Training the Goodest Boy or Girl?

Barrier aggression is a dog behavior exhibited when you place your pet behind fences or gates. Learn how you can use counter-conditioning to curb your dog’s barrier frustration.

Barrier aggression is a dog behavior exhibited when you place your pet behind fences or gates. Learn how you can use counter-conditioning to curb your dog’s barrier frustration.
