Kennel cough, a common and highly contagious respiratory disease, affects dogs of all ages and breeds. Also known as infectious tracheobronchitis, this condition is characterized by a dry, hacking cough that can cause discomfort and distress in affected dogs.
In this guide, we will explore the causes, symptoms, and treatment options for kennel cough, as well as provide tips for prevention and care to help keep your furry friend healthy and happy.
Key Takeaways
- Kennel cough is a highly contagious respiratory infection that affects a dog's upper airways.
- Most uncomplicated cases improve within one to three weeks with supportive care.
- Home remedies help relieve symptoms but do not eliminate the underlying infection.
- Rest, hydration, humidified air, and proper nutrition often support recovery.
- Holistic therapies, including CBD and certain nutritional supplements, may complement veterinary treatment by supporting comfort and immune function, although evidence continues to evolve.
- Persistent coughing, breathing difficulty, fever, or loss of appetite warrant veterinary evaluation.
- Vaccination and avoiding exposure to infected dogs remain the best preventive strategies.
What Is Kennel Cough?
Kennel cough is a contagious respiratory disease that causes inflammation of your dog's trachea (windpipe), larynx (voice box), and upper airways. Veterinarians often refer to the condition as Canine Infectious Respiratory Disease Complex (CIRDC) because multiple viruses and bacteria can contribute to the illness rather than a single infectious organism.
Although the name "kennel cough" suggests dogs only become infected in boarding facilities, your dog can contract the disease anywhere dogs gather. Dog parks, daycare facilities, grooming salons, training classes, pet stores, shelters, and even neighborhood walks where dogs interact can all provide opportunities for exposure.
Most healthy adult dogs recover without complications. However, puppies, senior dogs, brachycephalic breeds, and dogs with weakened immune systems have a greater risk of developing more serious respiratory infections, including pneumonia.
What Causes Kennel Cough?
Kennel cough develops after exposure to one or more infectious organisms. Stress, close contact with other dogs, poor ventilation, and weakened immunity can all increase your dog's risk of becoming infected.
Bordetella bronchiseptica
Bordetella bronchiseptica is the bacterial organism most commonly associated with kennel cough. It attaches to the lining of the respiratory tract, damages protective cilia, and allows additional infectious organisms to invade more easily.
Although Bordetella vaccines significantly reduce disease severity, vaccinated dogs may still develop mild respiratory infections because multiple pathogens contribute to kennel cough.
Canine Parainfluenza Virus
Canine parainfluenza virus is one of the most common viral causes of kennel cough. The virus damages respiratory cells, making the airways more susceptible to bacterial infection and increasing inflammation throughout the upper respiratory tract.
Dogs infected with parainfluenza often develop a dry cough several days after exposure, especially following visits to areas where many dogs congregate.
Canine Adenovirus Type 2
Canine adenovirus type 2 contributes to respiratory inflammation and frequently occurs alongside other infectious organisms. Modern combination vaccines have dramatically reduced severe illness caused by this virus, although mild infections still occur.
Canine Influenza Virus
Canine influenza can produce symptoms similar to kennel cough but often causes more pronounced illness. Dogs may experience coughing, nasal discharge, lethargy, fever, and decreased appetite. Because influenza spreads rapidly through canine populations, outbreaks occasionally occur in boarding facilities, shelters, and daycare centers.
Mycoplasma Species
Mycoplasma bacteria frequently accompany viral infections and Bordetella. These organisms lack a traditional bacterial cell wall, allowing them to interact differently with the immune system than many other bacteria. Their presence may prolong coughing or increase respiratory inflammation in some dogs.
Environmental Factors
Exposure alone does not guarantee illness. Environmental conditions also influence your dog's ability to resist infection.
Risk factors include:
- Boarding kennels
- Dog daycare facilities
- Grooming salons
- Animal shelters
- Dog parks
- Training classes
- Poor ventilation
- Cold weather
- High stress
- Recent travel
- Existing respiratory disease
Stress deserves particular attention because elevated cortisol levels can temporarily suppress normal immune function, making dogs more susceptible to respiratory infections after boarding, travel, surgery, or major environmental changes.
Is Kennel Cough Contagious?
Yes. Kennel cough spreads very easily between dogs through respiratory droplets produced during coughing, sneezing, barking, or close nose-to-nose contact. Shared water bowls, toys, bedding, and contaminated surfaces may also contribute to transmission, although direct respiratory exposure remains the primary route.
Most dogs become contagious several days before obvious symptoms appear and may continue shedding infectious organisms for up to two weeks after clinical signs improve. For this reason, veterinarians generally recommend keeping infected dogs away from other dogs until they have fully recovered and stopped coughing.
Kennel cough rarely spreads to healthy people. However, individuals with severely weakened immune systems should exercise caution around infected animals and consult their healthcare provider if they have concerns.
Why Does Kennel Cough Cause a Honking Sound?
The classic "honking" cough occurs because inflammation narrows and irritates your dog's trachea. Every cough creates additional vibration within the inflamed airway, producing the distinctive goose-honk sound many owners recognize.
This cough often becomes worse after excitement, exercise, barking, pulling on a collar, or changes in temperature because these activities further irritate already inflamed tissues.
Some dogs also gag or retch immediately after coughing. Although this can appear alarming, the gagging usually results from throat irritation rather than nausea or digestive disease.
How Long Does Kennel Cough Last?
Most uncomplicated cases of kennel cough improve within one to three weeks, although some dogs continue coughing for several weeks after the infection has cleared because airway tissues require additional time to heal.
Recovery depends on several factors, including:
- Your dog's age
- Overall immune health
- The specific infectious organisms involved
- Whether secondary bacterial infections develop
- Underlying heart or lung disease
- How quickly supportive care begins
Dogs that remain bright, active, and continue eating despite occasional coughing generally have an excellent prognosis. However, coughing that worsens instead of gradually improving should always be evaluated by your veterinarian.
Symptoms of Kennel Cough
The hallmark symptom of kennel cough is a sudden, dry, hacking cough that often sounds like a goose honking. However, because kennel cough is caused by several viruses and bacteria, symptoms can vary depending on the organisms involved, your dog's age, and their overall health.
Most dogs remain bright, alert, and interested in eating despite frequent coughing. If your dog becomes lethargic, develops difficulty breathing, or stops eating, the illness may be progressing beyond uncomplicated kennel cough and should be evaluated by your veterinarian.
Dry, Honking Cough
A dry, forceful cough is the most recognizable symptom of kennel cough. It occurs because inflammation irritates the trachea and upper airways, making them extremely sensitive to even minor stimulation. Excitement, barking, exercise, or pressure from a collar can easily trigger coughing episodes.
Although the cough often sounds severe, many otherwise healthy dogs remain active and recover without complications.
Gagging or Retching After Coughing
Many dogs gag or appear to retch immediately after a coughing fit. This happens because repeated coughing irritates the throat and stimulates the gag reflex. Some owners mistake this for vomiting, but little or no stomach contents are usually produced.
If your dog is repeatedly vomiting food or fluid rather than simply gagging, another medical condition may also be present.
Sneezing
Some dogs develop mild sneezing because the same infectious organisms affecting the trachea can also inflame the nasal passages. Sneezing is generally mild and improves as the respiratory infection resolves.
Nasal Discharge
Clear nasal discharge may accompany kennel cough, particularly when viral infections are involved. Thick yellow or green discharge, however, may indicate a secondary bacterial infection or another respiratory condition that warrants veterinary evaluation.
Mild Eye Discharge
Inflammation affecting the upper respiratory tract can sometimes cause watery or slightly irritated eyes. Mild tearing is usually not a cause for concern, but significant redness, swelling, or pus should be examined by your veterinarian.
Mild Lethargy
Many dogs with uncomplicated kennel cough continue playing and eating normally. Others may seem slightly more tired than usual as their immune system fights the infection.
Moderate or severe lethargy is not typical of uncomplicated kennel cough and may indicate pneumonia or another underlying illness.
Reduced Appetite
A sore throat and frequent coughing can make eating uncomfortable for some dogs. Offering softened food or slightly warming meals may encourage eating while reducing throat irritation.
Dogs that refuse food for more than 24 hours should be evaluated by a veterinarian.
Fever
Most uncomplicated cases of kennel cough do not produce a significant fever. An elevated temperature may suggest that the infection has spread deeper into the lungs or that another illness is present.
If your dog feels unusually warm, becomes depressed, or develops labored breathing, seek veterinary care promptly.
Can Kennel Cough Be Treated at Home?
Yes, many healthy adult dogs with mild kennel cough can recover successfully at home with supportive care. Home remedies do not cure the infection itself, but they can reduce airway irritation, support your dog's immune system, improve comfort, and encourage a smoother recovery while the body clears the infection naturally.
The key is knowing when home care is appropriate and when veterinary treatment becomes necessary.
If your dog remains bright, continues eating, drinks normally, and experiences only a mild cough without breathing difficulty, supportive care is often sufficient. However, puppies, senior dogs, pregnant dogs, brachycephalic breeds, or dogs with chronic heart or lung disease should be monitored more closely because they have a greater risk of developing complications.
Home care should always focus on supporting recovery—not replacing veterinary medicine when your dog needs medical treatment.
Can Kennel Cough Go Away on Its Own?
Yes. Many healthy adult dogs recover from mild kennel cough without antibiotics because their immune system successfully eliminates the infection over time. Supportive home care focuses on reducing airway irritation, maintaining hydration, supporting the immune response, and helping your dog remain comfortable during recovery.
However, not every dog is an appropriate candidate for home management. Puppies, elderly dogs, immunocompromised pets, and dogs showing signs of pneumonia or respiratory distress often require veterinary treatment to prevent potentially serious complications.
Frequently Asked Questions
What is the typical duration of kennel cough in dogs?
The duration of kennel cough in dogs can vary depending on the severity of the infection. Mild cases can last for a week or two, while more severe cases can last up to six weeks. It's important to monitor your dog's symptoms and consult with your veterinarian if the cough persists for an extended period of time.
Are antibiotics necessary for treating kennel cough in dogs?
In most cases, antibiotics are not necessary for treating kennel cough in dogs. Kennel cough is usually caused by a viral infection, which means antibiotics will not be effective. However, if your dog's symptoms are severe or if there is a secondary bacterial infection, your veterinarian may prescribe antibiotics.
What are some effective home remedies for kennel cough in dogs?
There are several home remedies for kennel cough that can help alleviate your dog's symptoms. Steam therapy, honey, and chicken broth are all effective in soothing your dog's throat and reducing coughing. Additionally, ensuring your dog is well-hydrated and rested can help speed up the healing process.
Can kennel cough in dogs be prevented?
While it's impossible to completely prevent kennel cough in dogs, there are steps you can take to reduce the risk of infection. Vaccination is the best way to prevent kennel cough, and it is especially important if your dog is regularly exposed to other dogs. Additionally, avoiding crowded areas and ensuring proper hygiene can also help reduce the risk of infection.
How is kennel cough in dogs diagnosed?
Kennel cough in dogs is typically diagnosed based on clinical symptoms and a physical examination. Your veterinarian may also recommend diagnostic tests, such as blood work or a chest x-ray, to rule out other possible causes of your dog's cough. If your dog is diagnosed with kennel cough, your veterinarian will work with you to develop a treatment plan.
