DOGS · Symptom guide
Dog coughing: what veterinary case reports identify
A coughing dog is a triage problem: the cause could be as benign as kennel cough (resolves in 1-2 weeks) or as serious as congestive heart failure from mitral valve disease. The clinical clues that separate them are: the dog's age, the character of the cough (honking vs. wet vs. dry), whether it's worse at night or after exercise, and whether breathing rate at rest is elevated.
Across published cases, the conditions to consider are: infectious tracheobronchitis ("kennel cough"), myxomatous mitral valve disease with left-heart failure (small-breed dogs over 7), collapsing trachea (toy breeds), chronic bronchitis, bacterial or fungal pneumonia, foreign body aspiration, and heartworm disease in endemic regions.
The cases below are real veterinary reports of coughing dogs and what the workup found.
When to see a vet now
- Sleeping respiratory rate over 30 breaths per minute (count for 60 seconds while the dog is asleep).
- Blue-tinged gums, fainting episodes, or sudden collapse.
- Coughing up blood or pink-tinged frothy fluid.
- Worsening over a few days rather than improving.
- Any cough in a senior small-breed dog who hasn't been screened for heart disease.
Real cases from the veterinary literature
A teaser of peer-reviewed reports our semantic search surfaces for this complaint. Click into any case for the full abstract — or run a personalised search with your pet's exact details.
- Tracheal External Support Using a Parallel Loop Line Prosthesis for Tracheal Stent Fracture in a Dog: A Case Report.
Journal Article · 2026 · Japan
A 4-year-old Yorkshire Terrier was brought in for breathing problems due to a complete fracture of a tracheal stent, which is often used to treat tracheal collapse. After imaging and a bronchoscopy, the vet found that the stent pieces were causing significant airway blockage. To fix this, they used a special external support called a parallel loop line prosthesis, which helped
- Canine and Feline Tracheobronchial Foreign Bodies: A UK Multi-Centre Study
Animals · 2026 · CH
A group of dogs and cats were brought in for coughing due to inhaling foreign objects, which is more common in dogs. The most affected breed was the Labrador retriever, and many cases occurred during the summer months. Vets used imaging techniques like CT scans to locate the objects, which were successfully removed using a bronchoscope in most cases. All pets recovered well and
- Tracheal External Support Using a Parallel Loop Line Prosthesis for Tracheal Stent Fracture in a Dog: A Case Report
Animals · 2026 · CH
A 4-year-old Yorkshire Terrier was brought in for breathing problems due to a complete fracture of a tracheal stent, which is often used to treat tracheal collapse. After imaging and a bronchoscopy, the vet found that the fractured stent was causing significant airway obstruction. To fix this, they used a special external support called a parallel loop line prosthesis, which he
- Comparative pathogenicity of wild-type and E3-deleted canine adenovirus type 2 in experimental canine infections.
Microbial pathogenesis · 2026 · China
A group of dogs infected with canine adenovirus type 2 (CAdV-2) showed symptoms like coughing, nasal discharge, and fever after being exposed to the virus. The researchers found that both a new strain with a genetic mutation and the original strain caused similar respiratory issues, including inflammation in the trachea and lungs. All infected dogs had high levels of the virus
- Increased serum antibody responses to Aspergillus fumigatus and house dust mite antigens in dogs with idiopathic eosinophilic bronchopneumopathy.
Journal of veterinary internal medicine · 2026 · France
A group of dogs with eosinophilic bronchopneumopathy (EBP), a condition that causes breathing problems, showed higher levels of certain antibodies related to house dust mites and Aspergillus fumigatus, a type of mold. While the tests indicated low levels of specific IgE antibodies, which are usually linked to allergies, the IgG antibodies were significantly higher in these dogs
- A prospective cohort study of C-reactive protein as a marker of aspiration pneumonia in canine tick paralysis (Ixodes holocyclus).
Australian veterinary journal · 2026 · Australia
A group of dogs with tick paralysis were evaluated for signs of pneumonia, which can happen when they inhale food or liquid into their lungs. Researchers found that measuring a protein called C-reactive protein (CRP) can help detect pneumonia in these dogs. When CRP levels were 20 mg/L or higher, it indicated a high chance of pneumonia, and the levels increased as the severity
Frequently asked questions
- How do I know if it's heart failure vs. kennel cough?
- Kennel cough: usually young or recently boarded/socialised dog, honking dry cough often ending in a gag, no exercise intolerance, normal sleeping respiratory rate (<25 breaths/min). Heart failure: typically older small-breed dog, soft moist cough often at night, elevated sleeping breath rate, sometimes faint heart murmur on exam. The two need very different workups — radiographs and a heart auscultation usually sort it out quickly.
- When does kennel cough need antibiotics?
- Most uncomplicated cases don't — it's usually viral. Antibiotics (doxycycline) are reserved for dogs with green/yellow nasal discharge, fever, lethargy, or symptoms persisting beyond 2 weeks. Cough suppressants are reasonable for the dry hacking phase.
- What's the sleeping respiratory rate test?
- Count your dog's breaths for 60 seconds while they're fully asleep (not panting, not dreaming-twitching). A healthy dog is under 30, usually 15-25. Anything consistently over 30 at rest in a dog with cough is a strong signal for heart-related fluid build-up and warrants same-week vet attention.