Kennel Cough (Bordetella) — Calgary
Kennel cough — infectious tracheobronchitis — is the most common respiratory disease in dogs attending group settings. It's caused by a combination of pathogens: most notably Bordetella bronchiseptica, Canine Parainfluenza Virus, and Canine Adenovirus-2. The 2022 AAHA Canine Vaccination Guidelines are direct: Bordetella vaccination is the standard of care for any dog that uses shared facilities. If your dog attends daycare, boarding, training classes, or dog parks regularly, annual Bordetella vaccination is not optional.
Why This Matters
Kennel cough spreads through the air — through barking, coughing, and close sniffing contact. A single infected dog in a group environment can expose every other dog in the space within hours. Most healthy adult dogs recover within 1–3 weeks, but puppies, senior dogs, immunocompromised dogs, and brachycephalic breeds (bulldogs, pugs, French bulldogs) face a real risk of secondary pneumonia. Prevention is straightforward. Waiting to vaccinate until after your dog gets sick is not a plan.
Key Facts
Kennel cough has a 2–14 day incubation period — an infected dog can be asymptomatic and contagious for days before showing obvious signs.
2022 AAHA Canine Vaccination Guidelines
Multiple pathogens cause infectious tracheobronchitis — Bordetella vaccination doesn't cover all of them, but it significantly reduces severity and duration of illness.
2022 AAHA Canine Vaccination Guidelines
Three vaccine formats exist: injectable (protection within 4 days), intranasal (48–72 hours to protection), and oral (newer, equivalent efficacy). All require annual renewal for dogs in group settings.
2022 AAHA Canine Vaccination Guidelines
Most healthy adult dogs recover from kennel cough without treatment in 1–3 weeks. Secondary bacterial pneumonia is the serious complication — it occurs primarily in vulnerable dogs.
2022 AAHA Canine Vaccination Guidelines
Vaccinated dogs can still contract a mild form of kennel cough — the vaccine's purpose is severity reduction and protecting the vulnerable dogs around them, not absolute prevention.
2022 AAHA Canine Vaccination Guidelines
Aerosol transmission means distance between dogs is not a meaningful protection measure — kennel cough can spread in any shared airspace, not just through direct nose-to-nose contact.
2022 AAHA Canine Vaccination Guidelines
What Owners Should Do
Practical steps you can take right now.
- 1
Vaccinate your dog for Bordetella annually if they use any group setting — daycare, boarding, training classes, or high-traffic dog parks.
- 2
Track the expiry date of the Bordetella vaccine separately from DA2PP — they often don't align on the same renewal date.
- 3
If your dog develops a honking cough after any group setting exposure, keep them home and call your vet.
- 4
Keep your dog home from daycare and shared environments until at least 7–10 days after all symptoms have resolved — do not return as soon as the cough sounds better.
- 5
Ask your vet which vaccine format (injectable, intranasal, oral) they recommend — intranasal acts fastest if coverage is needed quickly before a boarding trip.
- 6
Notify the daycare or boarding facility promptly if your dog develops kennel cough after attending — they need to monitor and notify other owners.
- 7
Don't share water bowls with unfamiliar dogs at dog parks — while not the primary transmission route, it's a sensible general hygiene measure.
Warning Signs to Watch For
Know when something needs attention.
- Harsh, honking or gagging cough — often described as sounding like something is stuck in the throat — particularly after any group setting exposure.
- Runny nose, watery eyes, and mild lethargy accompanying the cough — these are typical of the mild form.
- Laboured breathing, reduced appetite, and high fever accompanying a cough — these suggest secondary pneumonia and require immediate veterinary attention.
Call your vet if your dog develops a cough after any group setting exposure. Mild kennel cough may not require treatment beyond rest and supportive care, but a vet assessment confirms it's not progressing to pneumonia. See your vet urgently if there is any difficulty breathing, high fever, or loss of appetite alongside the cough.
The PAWS Perspective
Kennel cough outbreaks in shared care environments are fast and visible. One dog comes in slightly off — owners sometimes notice but often don't because the incubation means the dog isn't coughing yet — and within a week, we're getting calls from multiple families. Annual Bordetella cuts that risk materially.
Our Bordetella requirement is a direct reflection of the aerosol transmission reality of shared care. The shared airspace of a daycare — however well-ventilated — cannot eliminate aerosol transmission risk. Every vaccinated dog in our pack makes every other dog in our pack safer. That's not a metaphor, it's epidemiology.
"I've had to navigate kennel cough outbreaks and they're awful — for the dogs, for the owners, and for us operationally. The vaccine doesn't make it impossible, but it makes it far less likely and far less severe when it does happen. Annual Bordetella is the price of admission to shared dog care. That's a clear, defensible line and I hold it."
— Eric Yeung, Owner, PAWS Dog Daycare
Even with full compliance, kennel cough can circulate through a well-managed facility. No vaccination protocol eliminates all risk from a multi-pathogen respiratory syndrome. We communicate transparently if we have a confirmed case in our pack and ask affected dogs to stay home.
Kennel Cough (Bordetella): What Group Care Owners Need to Know — FAQs
My vaccinated dog got kennel cough — does that mean the vaccine didn't work?
How long is kennel cough contagious?
Can kennel cough be fatal?
Why does PAWS require annual Bordetella specifically?
Can my dog get kennel cough from a dog park even if they're vaccinated?
Is kennel cough the same as the 'dog flu'?
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