Yes, kennel cough is treatable, and most dogs recover without any medication at all. The majority of cases resolve on their own within three weeks, though symptoms can linger for up to six weeks in some dogs. Treatment focuses on keeping your dog comfortable while their immune system clears the infection, with antibiotics reserved for cases that show signs of a more serious bacterial component.
Most Cases Clear Up Without Antibiotics
Kennel cough, formally called canine infectious respiratory disease complex (CIRDC), is most often caused by viruses. Because of that, antibiotics won’t help the typical case. Most dogs with kennel cough, even those producing thick nasal discharge, keep eating normally and stay alert. International veterinary guidelines recommend a 10-day observation window before considering antibiotics, because the infection will often resolve on its own during that time.
The hallmark symptom is a harsh, honking cough that sounds alarming but usually isn’t dangerous. Your dog may gag or retch at the end of a coughing fit, which owners sometimes mistake for vomiting. Between coughing episodes, most dogs act completely normal.
When Your Vet Will Prescribe Medication
Antibiotics enter the picture when a dog develops fever, loss of appetite, or lethargy alongside thick nasal discharge. These signs suggest bacteria have moved in on top of the initial viral infection. The first-choice antibiotic is typically doxycycline, prescribed for 7 to 10 days. If a dog doesn’t tolerate doxycycline, amoxicillin or amoxicillin-clavulanate are common alternatives.
For dogs whose coughing is severe enough to prevent rest, vets may prescribe a cough suppressant. Options include hydrocodone, butorphanol, or codeine. These are purely for comfort and don’t treat the underlying infection. Some can cause noticeable sedation, which your vet will factor in when choosing one. Over-the-counter human cough syrups like dextromethorphan are a poor choice for dogs. A pharmacokinetic study found that dextromethorphan has such a short half-life and low absorption in dogs that it’s unlikely to work when given by mouth.
What You Can Do at Home
A few simple changes make a real difference in how comfortable your dog feels during recovery:
- Rest and reduced activity. Exercise and excitement trigger coughing fits. Keep walks short and low-key until symptoms resolve.
- Switch from a collar to a harness. Any pressure on the throat worsens irritation and coughing.
- Add humidity. Running a humidifier near your dog’s sleeping area or letting them sit in a steamy bathroom for a few minutes helps soothe inflamed airways.
- Honey. If your vet approves, raw honey can coat the throat and ease coughing. A general guideline is 1 teaspoon for small dogs and up to 1 tablespoon for larger dogs, given two to three times per day. Skip this for puppies under one year old or dogs with diabetes.
- No human medications. Many over-the-counter cold and cough products contain ingredients that are toxic to dogs.
You should also isolate your dog from other dogs during recovery. Kennel cough spreads easily through respiratory droplets, shared water bowls, and direct contact.
Signs the Infection Is Getting Worse
A small percentage of kennel cough cases progress to pneumonia, which is a more serious condition requiring aggressive treatment. Watch for fever, thick green or yellow nasal discharge, loss of appetite, lethargy or depression, and labored breathing. A cough that becomes wet and productive rather than dry and honking also signals deeper lung involvement. If your dog shows any combination of these, they need veterinary attention promptly rather than continued home care.
Puppies, senior dogs, and dogs with weakened immune systems or flat faces (brachycephalic breeds like bulldogs and pugs) are at higher risk for complications. These dogs warrant closer monitoring and a lower threshold for a vet visit.
Diagnosis Is Usually Straightforward
Most vets diagnose kennel cough based on symptoms and recent exposure history, such as a visit to a boarding facility, dog park, or groomer. Lab testing isn’t typically recommended for a single dog with a straightforward case. When testing is needed, perhaps during a shelter outbreak or when a dog isn’t responding to treatment, a respiratory PCR panel can identify the specific pathogen. This panel tests for several viruses and bacteria at once, including Bordetella, parainfluenza, canine distemper, and influenza A. Expect to pay around $130 for the panel, though prices vary by lab.
How Long Recovery Takes
Uncomplicated kennel cough typically resolves within three weeks. Some dogs, especially older ones or those with preexisting respiratory conditions, may cough intermittently for up to six weeks. If your dog is still coughing after six weeks, or if symptoms worsen at any point rather than gradually improving, a return vet visit is warranted to rule out other causes or complications.
During recovery, keep your dog away from other dogs for at least two weeks after symptoms fully resolve, since they can still shed the infection for a period after they stop coughing.
Vaccination Reduces Risk
The Bordetella vaccine is the primary preventive tool, and most boarding facilities, doggy daycares, and groomers require it. The vaccine is available as an injection, nasal spray, or oral dose. A 2025 study on the oral combination vaccine (covering both Bordetella and canine parainfluenza) found it provided protection for at least one year. In that study, only 9% of vaccinated dogs developed clinical signs after direct exposure, compared to 74% of unvaccinated dogs. Vaccinated dogs also shed significantly less virus from their noses, reducing the spread to other animals.
No vaccine prevents kennel cough entirely, because the disease can be caused by a range of different viruses and bacteria. But vaccination substantially reduces the severity and duration of illness if your dog does get infected. Most vets recommend annual boosters, or every six months for dogs with frequent exposure to other dogs in group settings.