Kennel Cough vs Reverse Sneezing in Dogs: How to Tell the Difference
Last Updated: July 2026
Reading Time: 11 Minutes
Article Summary
Kennel cough and reverse sneezing can sound surprisingly similar, causing many dog owners to worry that something is seriously wrong. While both conditions affect the respiratory system, they have different causes, symptoms, and treatment approaches. This veterinarian-informed guide explains how to recognize the difference between kennel cough and reverse sneezing, what each condition sounds like, when to seek veterinary care, and how to support your dog's respiratory health.
Quick Answer
How can I tell the difference between kennel cough and reverse sneezing?
Kennel cough usually causes a dry, repetitive hacking cough that may end with gagging or retching and can last for days or weeks. Reverse sneezing is a sudden episode of rapid, forceful inhalation through the nose that often lasts less than a minute and usually resolves on its own. If your dog has difficulty breathing, develops fever, becomes lethargic, or continues coughing for several days, contact your veterinarian.
Key Takeaways
-
Kennel cough is an infectious respiratory disease.
-
Reverse sneezing is usually harmless and temporary.
-
The sounds may appear similar but are caused by different mechanisms.
-
Understanding the difference helps owners know when veterinary care is needed.
-
Persistent coughing or breathing difficulty should always be evaluated.
Table of Contents
-
Kennel Cough vs Reverse Sneezing: What's the Difference?
-
What Does Each Condition Sound Like?
-
Common Causes of Each Condition
-
When Should You Worry?
-
Frequently Asked Questions
Introduction
Many dog owners panic the first time they hear their dog making loud coughing, gagging, or snorting noises.
Is it kennel cough?
Is my dog choking?
Or is it simply reverse sneezing?
Because both conditions involve sudden respiratory sounds, they are frequently confused.
Fortunately, although they may sound similar, kennel cough and reverse sneezing are very different conditions.
Kennel cough is an infectious respiratory illness that affects the airways and often causes a persistent dry cough.
Reverse sneezing, on the other hand, is usually a brief episode of rapid inhalation caused by temporary irritation of the upper airway.
Learning to recognize the differences in sound, duration, accompanying symptoms, and potential triggers can help you determine whether your dog simply needs reassurance—or prompt veterinary attention.
In this guide, we'll compare kennel cough and reverse sneezing side by side, explain what each condition sounds like, discuss their most common causes, and help you know when it's time to contact your veterinarian.
Kennel Cough vs Reverse Sneezing: What's the Difference?
Although both conditions affect the respiratory system, they occur for completely different reasons.
Kennel cough is usually caused by contagious viruses or bacteria that inflame the trachea and upper airway.
Reverse sneezing occurs when irritation causes the soft palate and throat to spasm briefly, leading to repeated forceful inhalation through the nose.
One is an infectious disease.
The other is generally a harmless reflex.
Understanding this distinction is the first step toward recognizing which condition your dog may be experiencing.
🔗 Related Reading
Kennel Cough Symptoms in Dogs: Signs, Causes, and When to Worry
Learn how kennel cough develops, recognize the most common symptoms, understand how it spreads, and know when your dog should be examined by a veterinarian.
👉 Read: Kennel Cough Symptoms in Dogs: Signs, Causes, and When to Worry
What Does Each Condition Sound Like?
One of the easiest ways to tell these conditions apart is by listening carefully to the sound they produce.
Although no two dogs sound exactly alike, there are several common patterns.
What Does Kennel Cough Sound Like?
Dogs with kennel cough often produce a:
-
Dry hacking cough
-
Repetitive coughing fits
-
Honking sound
-
Gagging after coughing
-
Retching as if something is stuck in the throat
The cough may continue for several days or even weeks, especially after excitement or exercise.
What Does Reverse Sneezing Sound Like?
Reverse sneezing sounds completely different.
Instead of coughing outward, your dog rapidly pulls air inward through the nose.
Typical signs include:
-
Loud snorting
-
Rapid inhalation
-
Neck extended forward
-
Standing still during the episode
-
Episodes lasting a few seconds to one minute
Most dogs return to normal immediately after the episode ends.
🔗 Related Reading
Why Is My Dog Coughing? Causes of Dog Cough, Gagging, Dry Heaving & What to Do
Learn about the many possible causes of coughing, gagging, dry heaving, and respiratory irritation in dogs, and discover when veterinary care is recommended.
👉 Read: Why Is My Dog Coughing? Causes of Dog Cough, Gagging, Dry Heaving & What to Do
Common Causes of Kennel Cough vs Reverse Sneezing
Although kennel cough and reverse sneezing both affect the respiratory system, they are triggered by very different underlying causes.
Understanding these differences can help you better recognize what your dog may be experiencing.
Kennel Cough Causes
Kennel cough (Canine Infectious Respiratory Disease Complex, or CIRDC) is a contagious illness caused by viruses, bacteria, or a combination of both.
Common infectious organisms include:
-
Bordetella bronchiseptica
-
Canine parainfluenza virus
-
Canine adenovirus
-
Canine respiratory coronavirus
-
Other respiratory pathogens
Dogs are more likely to develop kennel cough after visiting:
-
Boarding facilities
-
Dog daycare
-
Grooming salons
-
Dog parks
-
Training classes
-
Animal shelters
Because the disease spreads through airborne droplets and close contact, outbreaks often occur where many dogs gather together.
Reverse Sneezing Causes
Reverse sneezing is not contagious.
Instead, it is a protective reflex triggered by temporary irritation of the upper airway.
Common triggers include:
-
Pollen
-
Dust
-
Smoke
-
Strong household fragrances
-
Pulling on a collar
-
Excitement
-
Drinking water too quickly
-
Sudden temperature changes
Brachycephalic breeds—including French Bulldogs, Pugs, and Boston Terriers—experience reverse sneezing more frequently because of their shortened upper airways.
Side-by-Side Comparison
| Feature | Kennel Cough | Reverse Sneezing |
|---|---|---|
| Cause | Infectious disease | Temporary airway reflex |
| Contagious | ✅ Yes | ❌ No |
| Typical Duration | Days to weeks | Seconds to one minute |
| Common Sound | Dry hacking cough | Rapid snorting inhalation |
| Fever Possible | ✅ Yes | ❌ No |
| Veterinary Visit | Usually recommended | Usually unnecessary unless frequent |
When Should You Worry?
Reverse sneezing is usually brief and harmless.
Kennel cough, while often mild, may occasionally progress into more serious respiratory disease—especially in puppies, senior dogs, or dogs with weakened immune systems.
Contact your veterinarian promptly if your dog develops:
-
Coughing that lasts longer than one week
-
Difficulty breathing
-
Blue or pale gums
-
Fever
-
Thick nasal discharge
-
Loss of appetite
-
Extreme lethargy
-
Coughing up blood
-
Persistent wheezing
-
Frequent reverse sneezing episodes that become more severe or occur daily
Any dog that struggles to breathe should be treated as a veterinary emergency.
How Veterinarians Tell the Difference
Veterinarians usually diagnose kennel cough or reverse sneezing based on a combination of medical history, physical examination, and the pattern of respiratory sounds.
Depending on your dog's symptoms, additional testing may be recommended.
Medical History
Your veterinarian may ask questions such as:
-
Has your dog recently visited a boarding facility?
-
How long has the coughing lasted?
-
Are the episodes becoming more frequent?
-
Does your dog cough after exercise or excitement?
-
Is your dog vaccinated against Bordetella?
Physical Examination
A complete examination typically includes:
-
Listening to the lungs
-
Checking the trachea
-
Assessing breathing effort
-
Observing cough characteristics
-
Examining the nose and throat
Diagnostic Tests
When necessary, veterinarians may recommend:
-
Chest X-rays
-
Respiratory PCR testing
-
Blood work
-
Airway examination
-
Additional imaging studies
Most cases of reverse sneezing do not require diagnostic testing unless episodes become unusually frequent or are accompanied by other abnormal signs.
🛍 Product Recommendation
Daily Respiratory & Immune Support for Dogs
Healthy airways and a well-functioning immune system play important roles in your dog's respiratory wellness.
VUN Respiratory Support Drops are formulated with carefully selected botanical ingredients and vitamins to help support normal respiratory function, throat comfort, and immune health as part of a daily wellness routine.
For dogs that regularly visit dog parks, daycare, boarding facilities, or grooming salons, they may also benefit from additional support through the VUN Immune Support Collection.
👉 Explore VUN Respiratory Support Drops
🔗 Related Reading
The “Frenchie Honk”: Clinical Realities of Brachycephalic Respiratory Distress
Some brachycephalic breeds experience loud honking sounds that can easily be confused with kennel cough or reverse sneezing. Learn why these sounds occur and how BOAS affects breathing in French Bulldogs.
👉 Read: The “Frenchie Honk”: Clinical Realities of Brachycephalic Respiratory Distress
When Should You See a Veterinarian?
Although reverse sneezing is usually harmless, it's important to know when respiratory symptoms require professional evaluation.
You should contact your veterinarian promptly if your dog develops:
-
Coughing that lasts longer than one week
-
Repeated coughing episodes that become more frequent
-
Difficulty breathing or rapid breathing
-
Blue, gray, or pale gums
-
Fever
-
Thick yellow or green nasal discharge
-
Loss of appetite
-
Extreme lethargy
-
Coughing up blood
-
Collapse or weakness
-
Reverse sneezing episodes that occur multiple times every day or become progressively worse
Dogs that struggle to breathe should always be treated as a veterinary emergency.
Early diagnosis helps identify the underlying cause and reduces the risk of more serious respiratory complications.
Conclusion
Kennel cough and reverse sneezing may sound similar, but they are very different respiratory conditions.
Kennel cough is an infectious disease that usually causes a persistent dry hacking cough and may require veterinary treatment.
Reverse sneezing is typically a short-lived upper airway reflex that often resolves on its own without medical intervention.
By paying attention to:
-
The sound
-
The duration
-
The frequency
-
Accompanying symptoms
-
Your dog's overall behavior
you can better determine whether your dog simply needs observation or prompt veterinary care.
If you are ever uncertain, it's always safest to consult your veterinarian—especially if your dog develops breathing difficulty, fever, lethargy, or worsening respiratory signs.
Veterinary Insight
Although kennel cough and reverse sneezing can appear similar, they involve very different physiological processes. Kennel cough is most often caused by infectious organisms that inflame the respiratory tract, while reverse sneezing is typically a temporary reflex caused by irritation of the upper airway. Because early respiratory diseases can sometimes resemble one another, veterinarians evaluate not only the sound itself, but also the dog's breathing pattern, medical history, physical examination findings, and any accompanying clinical signs before making a diagnosis.
This article is intended for educational purposes only and should not replace professional veterinary diagnosis or treatment.
📍 Explore More Respiratory Health Resources
Want to learn more about kennel cough, coughing, reverse sneezing, brachycephalic airway syndrome (BOAS), and other common respiratory conditions?
Visit our Respiratory Health Hub for veterinarian-informed articles that help you understand common breathing problems, recognize early warning signs, and support your dog's respiratory wellness throughout every stage of life.
👉 Explore the Respiratory Health Hub
Frequently Asked Questions
1. Is reverse sneezing the same as kennel cough?
No. Reverse sneezing is usually a temporary upper airway reflex, while kennel cough is a contagious respiratory infection. Although they can sound similar, their causes and treatment are very different.
2. How long does reverse sneezing usually last?
Most episodes last only a few seconds to one minute. Dogs typically return to normal immediately afterward.
3. Can reverse sneezing turn into kennel cough?
No. Reverse sneezing does not develop into kennel cough because the two conditions have different causes. However, a dog can experience both conditions at different times.
4. Is kennel cough contagious?
Yes. Kennel cough spreads easily between dogs through respiratory droplets and close contact, especially in boarding facilities, daycare centers, dog parks, grooming salons, and shelters.
5. Should I take my dog to the vet after reverse sneezing?
Occasional reverse sneezing usually does not require treatment. However, frequent episodes, breathing difficulty, nasal discharge, or other abnormal signs should be evaluated by a veterinarian.
6. Why does my dog gag after coughing?
Dogs with kennel cough often gag or retch after a coughing fit because inflammation irritates the trachea and throat, making it feel as though something is stuck.
7. Which breeds are more likely to reverse sneeze?
Reverse sneezing is particularly common in brachycephalic breeds such as French Bulldogs, Pugs, Boston Terriers, and Bulldogs, although it can occur in dogs of any breed.
8. Can respiratory supplements replace veterinary treatment?
No. Nutritional supplements may help support normal respiratory wellness and immune health but should never replace veterinary diagnosis or treatment for infectious or chronic respiratory diseases.
Veterinary References
-
World Small Animal Veterinary Association (WSAVA) — Global Guidelines
-
American Animal Hospital Association (AAHA) — Canine Respiratory Health