The hallmark sign of kennel cough is a forceful, hacking cough that sounds like your dog has something stuck in their throat. Many owners describe it as a “honking” sound, almost like a goose. If your dog suddenly develops this distinctive cough, especially within a couple of weeks after being around other dogs, kennel cough is the most likely explanation.
What the Cough Sounds and Looks Like
The cough can be dry and hoarse, or it can be wet and productive, followed by gagging, a swallowing motion, or the production of mucus. It often comes in fits, sometimes triggered by excitement, exercise, or light pressure on the throat area. Many dogs will cough so forcefully that owners initially worry their dog is choking or about to vomit.
In most cases, dogs with kennel cough will appear completely healthy apart from the coughing. They’ll eat normally, stay active, and act like themselves between coughing episodes. Some dogs will also develop a runny nose, sneezing, or watery eye discharge, but these are secondary signs rather than the main event.
When Symptoms Appear After Exposure
Kennel cough has an incubation period of 2 to 14 days. So if your dog visited a boarding facility, groomer, dog park, or training class within the past two weeks and is now coughing, the timing fits. The condition spreads easily through airborne droplets, shared water bowls, and direct nose-to-nose contact, which is why it’s so common in places where dogs congregate.
Multiple bacteria and viruses can cause it, and dogs are sometimes infected by more than one organism at the same time. The most common culprit is a bacterium called Bordetella bronchiseptica, often alongside viruses like canine parainfluenza or canine adenovirus type 2.
How to Tell It Apart From Something More Serious
A dog with straightforward kennel cough is essentially a dog with a bad cold: coughing but otherwise normal. The signs that something more serious may be going on include:
- Lethargy or loss of appetite. A dog that stops eating, seems unusually tired, or doesn’t want to play is showing signs the infection may have moved deeper into the lungs.
- Labored or rapid breathing. Watch for your dog breathing harder than usual, even at rest. Flared nostrils or exaggerated belly movement during breathing are red flags.
- Fever. A warm, dry nose isn’t a reliable indicator, but if your dog feels hot to the touch around the ears and seems unwell overall, that’s worth noting.
- Thick or colored nasal discharge. A small amount of clear discharge is common with kennel cough. Thick, yellow, or green mucus suggests a secondary bacterial infection.
- Symptoms lasting longer than two weeks. Most dogs recover within about two weeks. If the cough persists or worsens beyond that window, the infection may have progressed or another condition could be involved.
Puppies, senior dogs, and dogs with flat faces (like bulldogs and pugs) are more vulnerable to complications, including pneumonia. If your dog falls into one of these categories, it’s worth getting them checked sooner rather than later.
What a Vet Visit Looks Like
Veterinarians typically diagnose kennel cough based on the combination of the characteristic cough, recent exposure to other dogs, and a physical exam. One common test during the exam involves gently pressing on the trachea (the windpipe). Dogs with kennel cough will usually cough immediately in response to this light pressure. In most straightforward cases, no lab work or imaging is needed. If the vet suspects pneumonia or another underlying condition, they may recommend X-rays or bloodwork.
How to Help Your Dog Recover at Home
Most mild cases of kennel cough resolve on their own with supportive care. The single most important thing you can do is keep your dog away from other dogs until they’ve fully recovered. That means skipping dog parks, daycare, boarding, and group walks. This protects other animals and gives your dog’s respiratory system time to heal without added stress.
A few practical steps can make your dog more comfortable during recovery:
- Switch to a harness. Collars put pressure on the throat, which can trigger coughing fits. Use a harness for walks until the cough is gone.
- Add moisture to the air. Running a humidifier in the room where your dog sleeps helps soothe irritated airways. You can also run a hot shower and let your dog sit in the steam-filled bathroom for 10 to 15 minutes.
- Keep them hydrated. Encourage drinking by offering low-sodium chicken or beef broth alongside fresh water.
- Soften their food. If your dog seems reluctant to eat, soaking kibble in water or broth makes it easier to swallow with a sore throat.
- Offer a small amount of honey. About half a teaspoon to one teaspoon of honey can help soothe the throat and calm coughing. Don’t give honey to puppies under one year old due to the risk of botulism.
- Remove irritants. Cigarette smoke, strong cleaning products, and heavy fragrances can worsen coughing. Keep the air around your dog as clean as possible.
Vaccination and Prevention
A vaccine exists for Bordetella, the most common bacterial cause, and it’s available in three forms: a nasal spray, an oral liquid, or an injection. The nasal and oral versions tend to work faster and last longer, providing protection within three to five days and offering at least 12 months of immunity. The injectable version requires two doses spaced several weeks apart and takes longer to build protection.
Most boarding facilities, groomers, and doggy daycares require proof of a current Bordetella vaccine. Boosters are typically given once a year, though dogs at high risk (frequent boarding, dog shows, regular daycare) sometimes get boosted every six months. The vaccine doesn’t guarantee your dog won’t get kennel cough, since multiple organisms can cause it, but it significantly reduces the risk and tends to make any breakthrough infection milder.