Kennel Cough — Symptoms, Treatment, and Prevention

What Exactly Is Kennel Cough?

Kennel cough is a broad term for a highly contagious respiratory infection in dogs. Think of it like the common cold in humans — it can be caused by a variety of bacteria and viruses, and it spreads easily in places where dogs gather closely together. The name comes from its tendency to sweep through boarding kennels, but your dog can pick it up at the groomer, dog park, vet waiting room, or even on a walk if they sniff noses with an infected pup.

The most common culprit behind kennel cough is the bacterium Bordetella bronchiseptica — which is why you'll often hear vets refer to the bordetella vaccine as the "kennel cough vaccine." However, several viruses can also cause or contribute to the illness, including canine parainfluenza virus, canine adenovirus type 2, canine respiratory coronavirus, and canine distemper virus. In many cases, a dog will be hit with a combination of both bacterial and viral agents, which can make symptoms more severe.

How Do Dogs Catch Kennel Cough?

Kennel cough spreads in three main ways, and unfortunately, all of them are things dogs love to do:

• Airborne droplets: When an infected dog coughs or sneezes, tiny respiratory droplets float through the air and can be inhaled by nearby dogs.
• Direct contact: Nose-to-nose greetings, shared water bowls, licking the same toys — basically all the social behaviors dogs are famous for.
• Contaminated surfaces: The bacteria and viruses can survive on surfaces like food bowls, crate doors, and even your hands and clothing for short periods.

Enclosed or crowded environments with poor ventilation are the perfect storm for transmission. That's why boarding facilities, shelters, doggy daycares, and indoor training classes are common hotspots. However, any interaction with an infected dog — even a quick hello on the sidewalk — can potentially lead to transmission. The incubation period is typically 2 to 14 days, so your dog might not show symptoms right away after exposure.

Kennel Cough Symptoms in Dogs: What to Watch For

The hallmark symptom of kennel cough is unmistakable once you've heard it: a persistent, forceful, dry cough that sounds like your dog has something stuck in their throat. Many pet parents describe it as a "honking" sound, almost like a goose. It can be alarming the first time you hear it, but knowing what to look for will help you stay calm and act quickly.

Here are the most common kennel cough symptoms dogs may display:

• A strong, dry, hacking cough (often described as "honking")
• Coughing fits that may end with gagging or retching
• Clear or slightly cloudy nasal discharge
• Sneezing
• Mild lethargy or reduced energy
• Slight decrease in appetite
• Low-grade fever (in some cases)

In mild cases — which thankfully represent the majority — your dog will still be eating, drinking, and generally acting like their usual goofy self between coughing fits. The cough tends to be worse after exercise, excitement, or when pressure is applied to the trachea (like pulling on a collar during walks).

How Kennel Cough Is Diagnosed

If you suspect your dog has kennel cough, your vet will typically diagnose it based on the combination of symptoms and recent history of exposure. If your dog was at a boarding facility, groomer, or dog park in the past two weeks and now has that distinctive honking cough, the diagnosis is often straightforward.

Your vet will perform a physical exam, listen to your dog's lungs, and may gently press on the trachea to see if it triggers a cough (called a "tracheal pinch test"). In most mild cases, no additional testing is needed. However, if your dog's symptoms are severe or aren't improving, the vet may recommend:

• Chest X-rays to rule out pneumonia or other respiratory conditions
• Blood work to check for signs of infection or immune compromise
• Culture and sensitivity testing of respiratory secretions to identify the specific pathogen
• PCR testing for specific viral or bacterial agents

It's worth noting that other conditions can mimic kennel cough, including canine influenza, heart disease, tracheal collapse, and even foreign objects lodged in the throat. That's why a vet visit is always a good idea when your dog develops a new or persistent cough — even if you're fairly sure it's kennel cough.

Kennel Cough Treatment: Getting Your Dog Feeling Better

Here's the reassuring part: most cases of kennel cough treatment are straightforward, and many dogs recover on their own within 1 to 3 weeks with just supportive care at home. Think of it like nursing a family member through a bad cold. However, the approach your vet recommends will depend on the severity of your dog's symptoms.

Mild Cases (Most Common)

• Rest: Limit exercise and excitement. Walks should be short and calm.
• Humidity: Running a humidifier near your dog's resting area can soothe irritated airways. Some owners let their dog sit in a steamy bathroom for 10-15 minutes.
• Honey: A half to one tablespoon of raw honey (for dogs over 1 year old) can help soothe the throat. Ask your vet first.
• Switch to a harness: Replace collars with a harness to avoid putting pressure on the trachea during walks.
• Cough suppressants: Your vet may prescribe a cough suppressant to help your dog (and you!) sleep at night.

Moderate to Severe Cases

• Antibiotics: If a bacterial infection like Bordetella is suspected or confirmed, your vet may prescribe antibiotics such as doxycycline or amoxicillin-clavulanate.
• Anti-inflammatory medications: To reduce airway inflammation and make breathing easier.
• Nebulization therapy: In more serious cases, your vet may recommend nebulizer treatments to deliver medication directly to the lungs.
• Hospitalization: Rarely, dogs with pneumonia or severe dehydration may need IV fluids, oxygen support, and inpatient care.

Preventing Kennel Cough: Vaccines and Beyond

Prevention is always better than treatment, and while you can't put your dog in a bubble (as tempting as that might be), there are several effective strategies to reduce your dog's risk of catching kennel cough.

The Bordetella Vaccine

The bordetella vaccine for dogs is the single most effective preventive measure against kennel cough. It's available in three forms: injectable, intranasal (squirted up the nose), and oral. Each has its pros and cons:

Most boarding facilities, doggy daycares, and groomers require proof of bordetella vaccination. Even if your dog isn't a frequent boarder, the vaccine is recommended for any dog that regularly interacts with other dogs. Your vet will advise on the best schedule — typically an initial vaccine followed by boosters every 6 to 12 months.

Other Prevention Strategies

• Choose reputable facilities: Look for boarding and daycare facilities that require vaccinations for all dogs, maintain clean environments, and have good ventilation.
• Avoid overcrowded dog areas: If kennel cough is going around in your community, limit trips to dog parks and pet stores temporarily.
• Keep vaccinations up to date: Beyond bordetella, make sure your dog's core vaccines (including parainfluenza and adenovirus) are current, as these viruses can contribute to kennel cough.
• Support your dog's immune system: Proper nutrition, regular exercise, adequate sleep, and minimizing stress all help your dog fight off infections.
• Wash shared items: Regularly clean bowls, toys, and bedding — especially after playdates or outings.

Kennel Cough in Puppies and Senior Dogs: Extra Caution Needed

While kennel cough is usually a minor inconvenience for healthy adult dogs, it can be more serious for certain groups. Puppies (especially those under 6 months) have immature immune systems and are more vulnerable to complications. Senior dogs and dogs with pre-existing conditions like heart disease, respiratory disorders, or immune suppression are also at higher risk.

For these dogs, kennel cough is more likely to progress to pneumonia, which can be life-threatening if not treated promptly. If you have a puppy or senior dog showing any signs of kennel cough, don't take a "wait and see" approach — call your vet right away. Early intervention can make all the difference.

Brachycephalic breeds (flat-faced dogs like Bulldogs, Pugs, and Shih Tzus) also deserve extra attention. Their already-compromised airways can make respiratory infections harder to manage, so keep a close eye on them during kennel cough season or after any exposure to other dogs.

Can Humans or Cats Catch Kennel Cough?

This is a question that comes up often in multi-pet households and for families with young children. Here's the quick answer:

• Cats: While rare, cats can be infected with Bordetella bronchiseptica, especially in shelters or multi-pet environments. If your dog has kennel cough, it's a good idea to limit direct contact with your cats, particularly if they are very young, very old, or immunocompromised.
• Humans: Transmission to humans is extremely rare and typically only a concern for people with severely weakened immune systems (such as those undergoing chemotherapy or living with HIV/AIDS). For the vast majority of families, there's no need to worry — just practice basic hygiene like handwashing after handling your sick pup.

When to Call the Vet: A Quick Checklist

It's always okay to call your vet when something seems off — you know your dog best. But here's a handy checklist of situations that definitely warrant a veterinary visit:

1. The cough lasts more than 5-7 days without improvement.
2. Your dog stops eating or drinking.
3. You notice thick, colored (green or yellow) nasal discharge.
4. Your dog seems lethargic, depressed, or unlike themselves.
5. Breathing becomes labored, rapid, or noisy.
6. Your dog is a puppy (under 6 months), a senior, or has a chronic health condition.
7. You have other dogs in the home and want guidance on isolation and prevention.

Your vet can confirm the diagnosis, rule out more serious conditions, and recommend the right kennel cough treatment plan for your dog's specific situation. Early vet visits also tend to be less expensive than waiting until things get worse — so when in doubt, make the call.

The Bottom Line: Kennel Cough Is Common, Treatable, and Preventable

Kennel cough is one of those things that sounds scarier than it usually is. Yes, that honking cough is unnerving. Yes, you'll probably lose a little sleep (your dog's midnight coughing fits are no joke). But with proper kennel cough treatment, a little patience, and some TLC, the vast majority of dogs bounce back within a few weeks feeling like their adventurous, tail-wagging selves.

Keep up with your dog's bordetella vaccinations, choose reputable facilities for boarding and grooming, and don't hesitate to see your vet if something doesn't feel right. Your dog depends on you to be their health advocate — and the fact that you're reading this article means you're already doing a great job.

And once your pup is back to 100%? That's the perfect time to celebrate their resilience. Whether it's a trip to their favorite trail, an extra-long belly rub session, or maybe even a personalized storybook from PetTales that turns their brave recovery into an illustrated adventure — your little hero deserves it.