Canine infectious respiratory disease complex (kennel cough)

Symptoms an owner can spot at home

• Sudden onset dry, honking cough (often described as 'like a goose')
• Retching or gagging at the end of a coughing fit, sometimes producing white foam
• Mild nasal or ocular discharge
• Normal or mildly reduced appetite and energy

When to see a vet

• Any cough lasting more than 7-10 days, or worsening rather than improving
• Fever, lethargy, appetite loss, or productive/wet cough, these suggest progression to pneumonia
• Any respiratory symptoms in a puppy under 4 months, an unvaccinated dog, or a dog with underlying heart disease
• Difficulty breathing, blue gums, or exercise intolerance, urgent care

What it is

Canine infectious respiratory disease complex (CIRDC) is a syndrome, not a single infection. Bordetella bronchiseptica is the classic bacterial cause, but the modern picture almost always involves multiple viruses (parainfluenza, adenovirus-2, respiratory coronavirus, influenza H3N2/H3N8) co-infecting the upper airway. The 'kennel' name reflects the classic exposure setting, boarding, daycare, dog parks, grooming, shelters, but transmission happens anywhere dogs share airspace within roughly 6 feet.

Incubation is 2-14 days. The characteristic dry honking cough emerges as the tracheobronchial epithelium becomes inflamed; most immunocompetent adult dogs clear the infection in 1-2 weeks without antibiotics. Complications, secondary bacterial pneumonia in particular, are the reason to escalate quickly if the picture changes.

How vets diagnose it

Diagnosis is usually clinical, a recent boarding or social exposure plus the classic cough. PCR respiratory panels (nasal or oropharyngeal swab) identify the specific pathogens and are used in outbreak investigation, in hospitalized or non-resolving cases, and to guide vaccine strategy for the household. Thoracic radiographs are indicated if pneumonia is suspected.

Treatment overview

This is editorial overview, not a treatment plan, your vet builds the plan. Uncomplicated cases are managed with rest, harness (never neck-collar), humidified air, and cough suppression when it interferes with sleep. Antibiotics are reserved for cases with fever, purulent nasal discharge, or radiographic evidence of pneumonia, indiscriminate antibiotic use contributes to resistance and does not shorten viral disease.

What owners can do

• Vaccinate before high-exposure events: Bordetella (oral, intranasal, or injectable), parainfluenza, and canine influenza. Most boarding facilities require Bordetella within the past 6-12 months.
• Isolate coughing dogs from other pets for at least 7 days after symptoms resolve.
• Walk on a harness during an active infection; neck pressure triggers coughing.
• Ventilate indoor spaces used by multiple dogs, ventilation is one of the most under-appreciated transmission controls.