Dog coughing — when to worry
An occasional cough in a bright dog is rarely urgent; persistent coughing, soft moist cough with froth, breathing changes, or any blue-tinged gums needs the vet now.
In the next 60 seconds
- Note when the cough started, what triggers it, and how often.
- Note breathing rate at rest (count chest rises in 30 seconds and double; over 35/minute at rest is concerning).
- Check gum colour — pink is normal, pale or blue is urgent.
- Take a phone video of the cough — extremely helpful for the vet.
- Avoid exercise that triggers coughing.
- Phone the vet for any persistent cough beyond 24–48 hours, or sooner for breathing changes.
Recognise the signs
- Dry, hacking cough — often kennel cough or upper-airway irritation
- Soft, moist cough with white or pink froth — heart failure or pneumonia
- Goose-honk-like cough — tracheal collapse
- Cough triggered by lead pressure or drinking — possibly tracheal
- Coughing more at night or after exertion — possibly cardiac
- Coughing with weight loss, lethargy, or off food — investigate further
- Blue or grey gums — emergency
First aid steps
- Note when the cough started, what triggers it, and how often.
- Note breathing rate at rest (count chest rises in 30 seconds and double; over 35/minute at rest is concerning).
- Check gum colour — pink is normal, pale or blue is urgent.
- Take a phone video of the cough — extremely helpful for the vet.
- Avoid exercise that triggers coughing.
- Phone the vet for any persistent cough beyond 24–48 hours, or sooner for breathing changes.
Do NOT
- Do not give human cough medicine — many contain ingredients harmful to dogs.
- Do not assume kennel cough resolves on its own in every case — secondary pneumonia can develop.
- Do not exercise hard a dog who is coughing.
- Do not delay if breathing is laboured or gums are pale or blue.
- Do not ignore a cough in a senior dog of a heart-disease-prone breed (e.g. Cavalier).
When to phone the vet immediately
- Difficulty breathing alongside cough
- Blue, grey, or very pale gums
- Soft moist cough with pink froth (suspected pulmonary oedema)
- Collapse
- Cough lasting more than 1 week
- Senior dog of a cardiac-prone breed with new cough
- Cough with weight loss, lethargy, or off food
When it can usually wait
- An occasional dry cough in a bright, fully eating, exercising dog with no other signs can be monitored for 24–48 hours; book a vet visit if not improving.
Common causes
- Kennel cough (infectious tracheobronchitis) — harsh dry cough, often after kennelling, training class, or daycare
- Heart disease with fluid in lungs — soft moist cough, often worse at night
- Reverse sneezing (often confused with coughing) — sudden inward snorts
- Tracheal collapse (small breeds — 'goose honk' cough)
- Foreign body — grass seed in airway, stuck object
- Lungworm
- Asthma or chronic bronchitis
- Pneumonia
- Tumour
- Heatstroke (rare presentation)
What the vet will need to know
- When the cough started
- Triggers — exercise, excitement, lead pressure, lying down, night-time
- Type — dry hack, soft moist, goose honk
- Frequency and severity
- Recent kennelling, training class, daycare, or new dogs
- Vaccination status (especially kennel cough vaccine)
- Phone video of the cough
- Other signs — appetite, energy, breathing rate, gum colour
Aftercare
- Treatment depends on cause — antibiotics for kennel cough with secondary infection, diuretics and heart medication for cardiac causes, bronchodilators for airway disease.
- Rest from hard exercise during recovery.
- Repeat exams as directed; chronic conditions need ongoing management.
- Address underlying disease — weight management, dental work (heart disease link), kennel cough vaccination.
Prevention
- Kennel cough vaccination before kennelling, daycare, or training classes.
- Avoid known triggers — smoke, dusty environments, scented sprays.
- Manage weight — obesity worsens almost all respiratory and cardiac conditions.
- Annual checks with stethoscope examination, especially in cardiac-prone breeds.
- Year-round lungworm prevention — the right product needs to be confirmed with the vet.
Breed-specific notes
- Tracheal collapse: Yorkshire Terrier, Pomeranian, Chihuahua, Toy Poodle.
- Heart disease cough: Cavalier King Charles Spaniel, Doberman, Boxer.
- Brachycephalic breeds with airway disease: Bulldog, French Bulldog, Pug.
Frequently asked questions
Is reverse sneezing the same as coughing?
No. Reverse sneezing is a sudden series of inward snorts — alarming to watch but rarely serious in itself. Coughing is an outward expulsion of air. Many owners and vets find phone videos invaluable for telling them apart.
How do I know if my dog's cough is heart-related?
Cardiac coughs tend to be soft, moist, often worse at night or after exertion, sometimes with pink-tinged froth. They usually develop in older dogs of cardiac-prone breeds. A heart murmur on stethoscope, X-ray, and ultrasound confirm the diagnosis. Any new cough in a Cavalier over 5, or other cardiac-prone breed, deserves prompt vet review.
Can my dog give me kennel cough?
The bacteria and viruses involved are largely species-specific, but Bordetella bronchiseptica (one component of kennel cough) can rarely cause illness in immunocompromised people. For most healthy households, transmission to humans is not a meaningful concern.