Health guide

Kennel Cough in Dogs: Australian Winter Outbreak Guide 2026

Cases spike every Australian winter. How to spot kennel cough, when to vet, and how to protect your dog from the current outbreak.

7 min read

The quick answer

1Kennel cough cases triple in Australian winter — the distinctive "honking" dry cough is the signature symptom
2Most healthy adult dogs recover in 1–3 weeks with rest; puppies, seniors, and immunocompromised dogs need urgent vet care
3Vaccinate annually (C5 + intranasal Bordetella) and avoid dog parks, daycare, and grooming during local outbreaks

When to see a vet

Kennel cough — properly called Canine Infectious Respiratory Disease Complex — is highly contagious and explodes through Australian dog communities every winter. The 2024 and 2025 winter outbreaks were particularly severe, with multiple Sydney, Melbourne, and Brisbane dog daycares closing temporarily. Most healthy adult dogs handle it fine. But vulnerable dogs can develop secondary pneumonia, which is dangerous. Knowing the signs and acting early matters.

Part 1

How to Recognise Kennel Cough

🦆 Loud honking cough: The defining sign — dry, harsh, often followed by retching. Different from a normal cough or reverse sneeze
😮‍💨 Cough triggered by excitement or activity: Pulling on lead, getting excited at door, after exercise — all trigger the cough. Distinctive of kennel cough
🤧 Mild nasal discharge or sneezing: Clear runny nose common. Yellow or green discharge suggests secondary infection — needs vet
👁️ Watery eyes: Mild conjunctivitis often accompanies the cough in early stages
🍖 Usually normal appetite and energy: Most dogs feel mostly normal between coughing fits — this distinguishes kennel cough from more serious illness
🌡️ Mild low-grade fever (optional): Some dogs run a slightly elevated temp (39.2°C+). Significant fever means secondary infection — see vet

Part 2

When to See the Vet

Puppy under 6 months coughing
Action
See vet within 24 hours
Urgency
High
Senior dog (10+) coughing
Action
See vet within 24 hours
Urgency
High
Dog with heart disease or breathing issues
Action
See vet immediately
Urgency
Urgent
Lethargy or refusing food
Action
See vet within 24 hours
Urgency
High
Yellow or green nasal discharge
Action
See vet within 24 hours
Urgency
High
Laboured breathing or rapid breathing
Action
Emergency vet immediately
Urgency
Emergency
Cough lasting more than 14 days
Action
Book vet appointment
Urgency
Moderate
Healthy adult with classic cough only, eating well
Action
Monitor at home — vet if worsens
Urgency
Low

Situation	Action	Urgency
Puppy under 6 months coughing	See vet within 24 hours	High
Senior dog (10+) coughing	See vet within 24 hours	High
Dog with heart disease or breathing issues	See vet immediately	Urgent
Lethargy or refusing food	See vet within 24 hours	High
Yellow or green nasal discharge	See vet within 24 hours	High
Laboured breathing or rapid breathing	Emergency vet immediately	Emergency
Cough lasting more than 14 days	Book vet appointment	Moderate
Healthy adult with classic cough only, eating well	Monitor at home — vet if worsens	Low

Part 3

Home Care for Healthy Adult Dogs

Recovery essentials

1
Strict rest — no walks for 7–10 days
Exercise inflames the airways and prolongs recovery. Skip walks entirely for the first week. Replace with indoor enrichment (lick mats, puzzles, scent games). Resume gentle leash walks only after coughing has fully subsided.
2
Switch to a harness
Collars pressure the trachea and trigger coughing fits. Switch immediately to a Y-front or H-back harness during recovery. This change alone reduces coughing fits by 50%+ in many dogs.
3
Steam therapy in the bathroom
Run a hot shower for 5–10 minutes with your dog (not in the water) in the steamy bathroom. The humidity soothes inflamed airways. Do this 2–3 times daily for 5–10 minutes. Best done before bed.
4
Manuka honey for cough soothing
A teaspoon of Manuka honey (UMF 10+) coats and soothes the throat. Most dogs love it. Has mild antibacterial properties. Avoid in puppies under 12 months and diabetic dogs. Not a cure — just symptom relief.
5
Soft, palatable food + plenty of water
Coughing makes eating uncomfortable. Switch temporarily to soft food (soaked kibble or wet food) and ensure constant fresh water. A bit of bone broth in water encourages drinking.

Part 4

Helpful Products for Recovery

Affiliate Disclosure: As an Amazon Associate I earn from qualifying purchases. Product links on this page go to Amazon AU. Prices shown are approximate, check Amazon for current pricing.

Throat Soother

Manuka Honey UMF 10+ (Medical Grade)

New Zealand Manuka honey with high methylglyoxal content for genuine antimicrobial activity. Soothes inflamed throat tissue and has mild infection-fighting properties. Give 1/2 teaspoon for small dogs, 1 teaspoon for medium, 2 teaspoons for large dogs, up to 3 times daily during cough.

UMF 10+ medical grade
Soothes inflamed throat
Mild antibacterial properties
Most dogs love the taste

View on Amazon$25–$60 AUD per jar

Immune Support

PAW DigestiCare Probiotic

Probiotic powder supports immune function during respiratory illness. Particularly helpful when antibiotics are prescribed (preserves gut flora). Australian-made by Blackmores. Mix into food — most dogs don't notice it.

Australian-made by Blackmores
Supports gut and immune function
Especially useful with antibiotics
Easy daily powder dose

View on Amazon$30–$45 AUD

Part 5

Vaccination — The C5 vs C3 Question

C3 (core)
Covers
Parvo, distemper, hepatitis
Frequency
Every 3 years
Required for
All dogs — legally required by most councils
C5
Covers
C3 + Bordetella + parainfluenza
Frequency
Annual
Required for
Dogs going to daycare, grooming, parks, boarding
Intranasal Bordetella
Covers
Bordetella only (faster onset)
Frequency
6–12 months
Required for
High-risk dogs needing quick protection
C7
Covers
C5 + leptospirosis variants
Frequency
Annual
Required for
Dogs in rural/farm environments with rats

Vaccine	Covers	Frequency	Required for
C3 (core)	Parvo, distemper, hepatitis	Every 3 years	All dogs — legally required by most councils
C5	C3 + Bordetella + parainfluenza	Annual	Dogs going to daycare, grooming, parks, boarding
Intranasal Bordetella	Bordetella only (faster onset)	6–12 months	High-risk dogs needing quick protection
C7	C5 + leptospirosis variants	Annual	Dogs in rural/farm environments with rats

Part 6

Avoid Catching It in the First Place

✅ Keep C5 vaccination current annually: Doesn't prevent infection entirely but dramatically reduces severity and duration
✅ Avoid daycare and dog parks during local outbreaks: Follow local Facebook dog groups and check with your daycare — they often post when there's a cluster
✅ Don't share water bowls at parks: Bordetella is shed in saliva. Public water bowls are infection hotspots during winter
✅ Wash hands after handling other dogs: You can transfer the bacteria from dog to dog on your hands and clothes
✅ Isolate sick dogs from healthy household dogs: Separate sleeping areas, food bowls, and toys for 21 days post-symptom resolution

During an outbreak in your area

Skip dog parks and daycare for 2 weeks
Avoid greeting unknown dogs on walks
Don't share water bowls at cafes or parks
Walk in less-trafficked areas (beach, bush, instead of busy park paths)
Wash hands after walks
Monitor your dog for any cough — early intervention shortens illness
Check that boarding facilities have a clean record before booking

Common questions

Can humans catch kennel cough from dogs?

The Bordetella bronchiseptica strain that causes most canine kennel cough can rarely infect immunocompromised humans, but this is extremely uncommon. Healthy adult humans don't catch it. The parainfluenza viruses are dog-specific. Wash hands after handling sick dogs as basic hygiene.

My dog was vaccinated for kennel cough — why did they still catch it?

The vaccine targets the main strains (Bordetella + canine parainfluenza) but kennel cough is a complex of multiple pathogens including various adenoviruses, mycoplasmas, and herpesvirus. Vaccinated dogs usually get milder, shorter illness — but breakthroughs happen. Like flu vaccines in humans.

How long is my dog contagious?

Most dogs are contagious for 10–14 days after the cough starts. Some shed bacteria for up to 12 weeks even after symptoms resolve. Standard advice: keep your dog isolated from other dogs for 21 days after the cough completely stops. Don't return to daycare or parks early.

Will antibiotics help kennel cough?

Only if there's bacterial involvement. Most kennel cough is viral or mixed — antibiotics don't treat viruses. Vets prescribe antibiotics (usually doxycycline) when they suspect bacterial complications or in vulnerable dogs as prevention. Don't self-prescribe — talk to your vet.

Can my dog go on walks during kennel cough recovery?

No walks for the first 7–10 days. Exercise inflames already-inflamed airways and prolongs illness. Resume gentle, short, leashed walks only after coughing fully stops. Don't return to dog parks or off-leash areas for 21 days after symptoms resolve.