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How to Stop a Dog From Chasing Cars

Adrienne is a certified dog trainer and former veterinarian assistant who partners with some of the best veterinarians worldwide.

Stopping a dog from chasing cars is important both for dogs on-leash or off-leash.

Stopping a dog from chasing cars is important both for dogs on-leash or off-leash.

The Risks of Allowing Dogs to Chase Cars

Chasing objects such as cars, bikes, or skateboards is an instinctual behavior in dogs that can be challenging to eradicate once a dog has performed this behavior for quite a while.

Fact is, practice makes perfect, and the more a dog rehearses a problem behavior, the stronger the behavior becomes. Problem behaviors can be compared to a weed which puts roots down, becoming more and more difficult to eradicate as time goes by. The same is true with many other undesirable self-reinforcing habits in dogs such as jumping, chewing things, bolting out the door, and escaping from yards.

Chasing cars, in particular, can be problematic for various reasons. First and foremost, if your dog is off-leash when he's chasing cars, you want to put an end to this habit sooner than later because it puts the dog at great risk of being run over, injured, and possibly killed.

On top of that, a dog's car chasing habit may be a great liability. Drivers may try to swerve to avoid the dog, which may lead to collisions. A dog who is hit by a car may also become projectile and injure others around them.

Dogs who want to chase cars when on leash may be free from many of these above risks but may encounter several other potential problems too. For instance, they may suddenly pull towards cars and get injured or they may suddenly lunge with all their force and drag their owners too close to oncoming traffic.

Stopping a dog from chasing cars is important both for dogs on-leash or off-leash. Here are some tips and guidelines pertinent to both scenarios.

How to Stop Dogs From Chasing Cars Off-Leash

Dogs who chase cars when off-leash are generally more challenging to deal with compared to dogs who chase cars on-leash. Dogs who chase cars off-leash are provided with more freedom to perform the behavior anytime they want. Off-leash dogs who get a taste of the habit may become soon addicted to it, so much so that they'll linger around the areas where cars pass by just for the purpose of chasing.

The behavior is highly reinforcing because, to a dog's eyes, he is often successful in chasing the car away from his property. Generally, the closer to home, the more confident or motivated the dog feels to chase the cars.

As the cars move away from the perceived property, the dog is less eager to continue the chase. Not because the dog is tired, but simply because he has lost motivation or enthusiasm.

Car chasing, in this case, is often triggered by territoriality and/or a need to feel safe by sending intruder, stranger cars away.

Car chasing in dogs may also stem from play, as a way to release pent-up energy, and out of some type of modified prey drive. Border collies are often seen chasing cars as a result of their innate predisposition to chase and round up fleeting objects just as they would do with sheep.

Preventing Rehearsal in the Name of Safety

Because chasing cars is highly instinctual and self-reinforcing, going against nature can be challenging and the only 100 percent successful way to tackle the situation is by preventing rehearsal of the problem behavior.

Confining the dog behind a secure fence (escape-proof should be the keyword here, considering that a dog may be willing to escape in order to chase cars) or in the home is important to keep both the dog and driver safe.

Preventing the dog from being at large in the first place is the most responsible action, especially considering that, nowadays, in this litigious society, there are always the chances for costly lawsuits.

Dogs allowed to roam unfortunately tend to get into trouble, engage in self-rewarding behaviors (such as car chasing, barking at people, killing small livestock, etc), and are at risk of being harmed by outsiders or stolen.

On top of not letting the dog run loose, it's helpful to train a dog to come when off-leash, should he accidentally manage to get loose one day.

The best way to tackle a dog's behavior of wanting to chase cars while on-leash is to use systematic exposure and training an alternate behavior.

The best way to tackle a dog's behavior of wanting to chase cars while on-leash is to use systematic exposure and training an alternate behavior.

Stopping Dogs From Chasing Cars On-Leash

If your dog is chasing cars on-leash, the behavior may be easier to tackle because you at least have some level of control. Car chasing in dogs on-leash may often stem from a desire to play, as a way to release pent-up energy or out of prey drive. Some dogs may be highly focused on the wheels, trying to lunge and grab them as they rotate. In some cases, dogs may want to chase cars because they find the sound produced by certain cars scary or unpleasant.

The best way to tackle a dog's behavior of wanting to chase cars while on-leash is to use systematic exposure and training an alternate behavior. In this case, you will need to dedicate a part of your walks for teaching your dog to better cope with the sight and sound of cars without overreacting.

To perform these exercises, it's best to start on a road where cars pass every now and then, versus the continuous flow of cars and traffic as seen in big cities, so that it becomes clear in your dog's mind that great things happen each and every time a car passes by.

For Dogs Who Are Not Fearful of Cars

Management helps set the dog up for success. Make sure you manage your dog's environment when you are not training by limiting exposure to cars, and when you need to train, do not flood your dog with intense exposure to stimuli.

One of the biggest mistakes dog owners make is exposing their dogs too close to their triggers or progressing in behavior modification too fast. This creates problems and potential setbacks.

It's important to start instead by finding a distance from cars from which your dog can hear and see them, but not that close that he'll be overstimulated and unable to focus. Below are some signs that you are too close to the cars and your dog is at risk of being too overstimulated.

From a distance where your dog seems to be responsive, you can then train him to perform an alternate behavior by providing high-value treats for performing it. Make sure your dog knows how to perform this alternate behavior very fluently at home and on walks before trying it in the face of cars. There are several alternate behaviors you can try.

You can ask for a stationary behavior such as a sit or a down, but because these are stationary exercises, I am not much of a fan of them. It is easy for the dog to sit and then break the sit right as the car is passing by or has passed. If you choose to do these stationary exercises, you have to make sure you start at a distance and initially provide several treats in a row for the duration of the car passing until the car is at a distance. Only once your dog becomes proficient in this, you can then start giving a treat for rewarding the final behavior of sitting once the car has passed.

Personally, I prefer doing several steps of attention heeling (dog heeling at your side while looking up at you) as the car is passing by because, with the dog in motion, you are likely to get a faster and more reliable response. Movement may help your dog get rid of some kinetic energy that would have otherwise been used by chasing.

To further discharge energy, you may find it helpful to turn treat delivery into a game where you toss the treat on the ground (if it's of the hard type) for your dog to chase.

Another option is to train your dog to make an "about turn" the moment he sees the car and move away with you.

Teaching "look at that" may also help get the dog's focus off the cars. You mark with a clicker or a verbal marker such as "yes," every time your dog looks at the cars from a distance. At some point, after several rehearsals, you should notice that your dog, upon spotting the cars, will look at you automatically for the treat. You can then decrease the distance very gradually.

As the dog performs the alternate behavior fluently at a certain distance from the cars, the distance can be gradually decreased, but you need to be very careful that your dog is not over threshold as you get closer to the cars.

If your dog is over threshold, and not paying attention to you and getting fixated on the cars, you are too close. Your dog is not ready for this level of distraction training level yet and therefore you will need to increase the distance again until your dog is more proficient at that distance before trying again at closer distances.

Signs Your Dog Is "Over Threshold" and Ready to Chase

  1. Fixated stare
  2. Wrinkled forehead
  3. Stiffening of body
  4. Closing of the mouth
  5. Quivering
  6. Pointing
  7. Stalking position

For Dogs Who Are Fearful or Anxious About Cars

If you think there may be a fear component at play when it comes to your dog's car-chasing behavior, in such a case, you are better off skipping asking for specific behaviors as in the exercise above but rather doing raw desensitization and counterconditioning.

In this case, you won't be asking for any particular behaviors. This works well because many fearful dogs are too upset about passing cars to cognitively function to perform obedience exercises.

Once again, teaching "Look at that" may help get the dog's focus off the cars. You basically, mark with a clicker or pronounce a verbal marker such as "yes," when your dog looks at the cars from a distance. At some point, upon spotting the cars, your dog will look at you automatically for the treat. You can then decrease the distance very gradually.

As your dog becomes more comfortable, you can then decrease distance, but if at any time your dog seems uncomfortable and over threshold, you need to revert to a farther distance.

In the case of chasing cars out of fear, only once your dog has proven to you that he's more comfortable around cars, you can then start asking for alternate behaviors such as a sit, down, or a few steps of attention heeling as described in the section above for dogs who are not fearful.

Walk your dog so that you are on the side cars pass, placing yourself between the cars and your dog.

Walk your dog so that you are on the side cars pass, placing yourself between the cars and your dog.

Help, My Dog Sits and Then Chases the Car Once It's Past Her

"Help my 11-month-old pup wants to chase cars on our daily walks. When a car approaches she watches it, sits, I reward and once it goes past us, she wants to run after it. What can I do?"

This is not an uncommon scenario. In a case as such, you are on the right track, only that you need to tweak your technique up a notch to prevent this from happening.

Increase Distance

For example, if your dog feels still compelled to chase despite asking for a sit, this is often a sign that your dog may still be a little too over threshold. So next time, try to walk a bit farther away from the road where the cars are passing. The more you can stick to the roadside, the better (and the safer, of course!).

Also, it may help for you to walk on the side that's closer to the cars so that you are between the cars and your dog. Your dog should be closest to the roadside. This gives your dog a little extra distance from the cars while also allowing you to use your body to block a bit of view, making the car a bit less salient. See the picture above.

Add More Duration

When you ask your dog to sit, try not to give the treat right away. If your dog can't sit for too long, you will need to teach your dog how to hold a longer sit-stay. Wait until a car has passed by at a distance that your dog doesn't feel compelled to chase. Toss the treat the opposite way so your dog will be too busy to care for the car. Even better, rather than just tossing a treat, toss several treats so that your dog has to go on a treasure hunt.

Ask For More Dynamic Behaviors

A sit may be a too stationary behavior, which can be unfulfilling to a dog with high prey drive who is quivering in anticipation. A better choice may be doing something more dynamic, such as several steps of attention heeling (dog heeling with his head up looking at you) or weaving through your legs or asking him to tug a toy. Make sure you reward all these activities with high-value treats.

Improvise a Hand-Held Kong

When you must reward your dog for engaging in an alternate behavior to the chasing, it may help to improvise a hand-held Kong so that he's kept busy trying to get the tasty treats from your closed hand. You can find how to do this here.


Behavior modification comes with risks. If your dog is exhibiting behavior problems, your best bet is to consult with a behavior professional using force-free training methods for in-person assistance and guidance.

This content is accurate and true to the best of the author’s knowledge and is not meant to substitute for formal and individualized advice from a qualified professional.

© 2018 Adrienne Farricelli


H Minster on February 27, 2020:

I suggest running them down with your car. Problem solved. I mean the owner not the dog.

Peggy Woods from Houston, Texas on April 01, 2018:

Fortunately we have never had a dog that liked to chase cars. Of course they were never free to do so since they were house dogs and when outside either in a fenced area or on leash walking with us. This is good information to know however and might help people who do have dogs who like to chase cars. That is a dangerous activity for sure!