Most cases of kennel cough clear up on their own within one to three weeks with basic supportive care at home. The infection is rarely dangerous for otherwise healthy adult dogs, but knowing what to do (and what to watch for) can shorten your dog’s misery and prevent complications like pneumonia.
Why Kennel Cough Usually Resolves on Its Own
Kennel cough, formally called canine infectious tracheobronchitis, is an inflammation of the windpipe and airways caused by a mix of bacteria and viruses. The most common culprit is the bacterium Bordetella bronchiseptica, often alongside canine parainfluenza virus. The hallmark symptom is a loud, forceful cough that sounds like a goose honk, sometimes followed by gagging or retching.
The disease is self-limiting in most dogs, meaning their immune system fights it off without medical intervention. Antibiotics are usually not needed unless there’s evidence the infection has moved into the lungs. That said, several home measures can make your dog more comfortable and support faster healing.
Home Care That Actually Helps
The most effective thing you can do is reduce anything that irritates your dog’s already inflamed airway. Start by switching from a neck collar to a body harness for all walks. A collar puts direct pressure on the trachea every time your dog pulls, which can trigger coughing fits and even injure delicate tissue. A harness distributes that pressure across the chest instead.
Humidity soothes irritated airways the same way it helps a human chest cold. Run a hot shower and let your dog sit in the steam-filled bathroom for 10 to 15 minutes. You can do this once or twice a day. If you have a humidifier, running it near your dog’s sleeping area achieves a similar effect over longer periods.
Honey can coat and calm an irritated throat. Give about 1 teaspoon for small dogs and up to 1 tablespoon for larger dogs, two to three times a day. Check with your vet first if your dog has diabetes, since honey raises blood sugar. Never give honey to puppies under one year old.
Keep your dog in a calm, warm environment. Excitement, cold air, and exercise all trigger coughing. Short, gentle leash walks for bathroom breaks are fine, but skip the dog park, daycare, and long hikes until the cough has fully resolved.
When Your Dog Needs Veterinary Treatment
A vet visit is warranted if the cough lasts longer than two weeks, if your dog stops eating or drinking, or if you notice any signs that the infection is worsening. The main concern is pneumonia, which develops when the infection spreads from the upper airways deep into the lungs.
Pneumonia symptoms include labored breathing, a wet or moist-sounding cough (rather than the dry honking cough), high fever, and thick nasal discharge. Puppies, senior dogs, and dogs with weakened immune systems are at highest risk for this progression.
If your vet diagnoses pneumonia or a secondary bacterial infection, they’ll prescribe antibiotics, typically for 7 to 14 days. The specific antibiotic is ideally chosen based on a culture that identifies which bacteria are involved. Cough suppressants are sometimes prescribed for dogs with a dry, unproductive cough that’s disrupting sleep or eating, but they’re not appropriate for dogs with pneumonia because coughing helps clear fluid from the lungs.
How Long Recovery Takes
A mild case in a healthy adult dog typically resolves within 7 to 14 days. More stubborn infections, especially those involving multiple pathogens, can linger for three weeks. You’ll usually notice the cough becoming less frequent and less forceful before it disappears entirely.
Dogs remain contagious for a period after their symptoms fade. A common guideline is to keep your dog away from other dogs for at least two weeks after the last cough. This means no boarding, grooming appointments, training classes, or off-leash play with unfamiliar dogs during that window. If you have multiple dogs at home and one gets kennel cough, the others have likely already been exposed by the time you notice symptoms.
Preventing Kennel Cough
The Bordetella vaccine is the primary prevention tool and is required by most boarding facilities, daycares, and grooming salons. It’s available as an injection, nasal spray, or oral liquid. A study published in Frontiers in Veterinary Science found that the oral combination vaccine (covering both Bordetella and parainfluenza) provided protection for at least one year. In that study, 74% of unvaccinated dogs developed symptoms after exposure, compared to only 9% of vaccinated dogs.
The vaccine doesn’t guarantee your dog won’t get kennel cough. Because tracheobronchitis can be caused by many different viruses and bacteria, the vaccine covers only the most common culprits. Think of it like the flu shot: it significantly lowers the odds and tends to make breakthrough cases milder.
Most vets recommend annual Bordetella boosters for dogs that regularly interact with other dogs. If your dog is boarding or starting daycare, the vaccine should be given at least a few days beforehand to allow immunity to develop. Beyond vaccination, good ventilation in kennels, avoiding overcrowded facilities, and steering clear of dogs with active coughs all reduce exposure risk.