Kennel Cough in Dogs: Symptoms, Treatment and Recovery

If your dog has suddenly developed a dramatic, honking cough that sounds like something is stuck in their throat, kennel cough is one of the most likely culprits. It sounds far worse than it usually is — most dogs recover well — but it's worth understanding so you can care for your dog properly and know when to get help.

This is general guidance, not a substitute for veterinary advice — if you're worried about your dog, contact your vet.

What kennel cough is

Kennel cough is the everyday name for an infectious cough that affects a dog's upper airways. It's caused by a mix of bacteria and viruses, which is why a single vaccine doesn't cover every cause. The name comes from how easily it spreads where dogs mix — boarding kennels, daycare, training classes, grooming salons, the park, even a shared water bowl. It spreads through the air in tiny droplets when dogs cough, and on surfaces, so your dog doesn't need nose-to-nose contact to catch it.

Think of it a bit like a chesty cold doing the rounds at a busy nursery: highly contagious, usually self-limiting, but occasionally hitting a vulnerable individual harder.

Common causes

Several different bugs can cause kennel cough, often working together. Dogs are most at risk when they're around lots of other dogs, in poorly ventilated indoor spaces, or already a bit run down. Stress — such as a recent stay in kennels — can also lower a dog's defences. Puppies, older dogs, and those with existing breathing or heart conditions can be affected more severely than a fit, healthy adult.

Signs and symptoms

The classic sign is a strong, dry, honking cough, often ending in a retch or gag that brings up a little white foam — this is frequently mistaken for vomiting, but it's coming from the airways, not the stomach. The cough is often triggered by excitement, exercise, or pressure on the throat from a collar.

Other signs can include:

• A runny nose or sneezing.
• Mild eye discharge.
• Reduced energy, though many dogs stay surprisingly bright.

Most dogs continue to eat normally and feel reasonably well in themselves despite the alarming noise. If your dog is genuinely off-colour, that's a flag to take more seriously.

What you can do at home

Most mild cases settle within a couple of weeks with rest and supportive care:

• Rest your dog and avoid vigorous exercise while they recover — short, gentle lead walks are usually fine, but skip the rough-and-tumble at the park.
• Swap a collar for a harness, as pressure on the throat sets off coughing fits.
• Keep them away from other dogs until your vet confirms they're no longer infectious, to avoid spreading it through your local dog community.
• Provide a comfortable, well-ventilated space to rest, and keep an eye on appetite and water intake.
• Avoid smoky or dusty environments, which can irritate the airways further.

Keeping vaccinations current can reduce the risk and severity — our vaccine reminder helps you stay on schedule, and the pet medicine calendar is handy if your vet prescribes anything. You'll find soft harnesses and comfort items in our shop.

Can I prevent kennel cough?

You can't make your dog completely bullet-proof, but you can lower the odds. The kennel cough vaccine is the main tool, and many boarding kennels and daycare providers require it before they'll take your dog — worth arranging well ahead of any holiday, as it isn't always effective immediately. Beyond vaccination, good ventilation, not sharing water bowls at busy parks, and giving a run-down or recovering dog time away from crowds all help. If there's a known outbreak doing the rounds locally, it's sensible to keep your dog away from communal dog spaces for a while. None of this guarantees protection — the bugs are common and spread easily — but it meaningfully reduces the risk, especially for puppies and older dogs.

How long does recovery take?

In a healthy adult dog, the worst of the cough often eases over one to two weeks, though a lingering cough can hang on a little longer. Don't rush your dog back to daycare or busy walks the moment they seem better, both for their recovery and to protect other dogs.

When to see a vet

Contact your vet if:

• The cough lasts more than a week or two, or is getting worse rather than better.
• Your dog seems unwell in themselves — off their food, lethargic, or feverish.
• You notice fast or laboured breathing, or any blue or pale gums (seek urgent help straight away).
• Your dog is a young puppy, elderly, or has another health condition such as a heart or lung problem.
• You're simply not sure whether the cough is kennel cough or something else.

Your vet can confirm the diagnosis, rule out other causes of coughing, and prescribe treatment if needed. If you need to find a practice, our vets directory can help. For coughs that come with sickness, our guide on why is my dog being sick may also help, and keeping on top of routine prevention links closely to how often to worm a dog and overall wellbeing.

Sources

• PDSA — Pet Health Advice
• Blue Cross — Pet Advice
• Dogs Trust — Dog Advice