Common Illnesses

Kennel Cough — Symptoms & Treatment

That distinctive honking cough after boarding or the dog park. What kennel cough is, how long it lasts, and when to worry.

📖 6 min read

Kennel cough is the canine equivalent of a common cold — highly contagious, typically self-limiting, and miserable for a week or two but rarely dangerous in healthy adult dogs. The name comes from its traditional association with boarding facilities, though it can be contracted anywhere dogs gather: dog parks, grooming salons, obedience classes, and vet waiting rooms.

What Is Kennel Cough?

Kennel cough (Canine Infectious Respiratory Disease Complex, or CIRD) is a catch-all term for highly contagious respiratory infections in dogs. The most common pathogen is Bordetella bronchiseptica bacteria, often combined with other viruses including Parainfluenza and Adenovirus-2. It spreads through airborne droplets, direct contact, and contaminated surfaces.

Transmission is rapid in group settings — one infected dog can infect dozens within days.

Symptoms

  • Distinctive "honking" cough — the most characteristic sign. Often sounds like something is stuck in the throat. Can be triggered by excitement, exercise, or pressure on the collar.
  • Retching after coughing (may produce white foam)
  • Mild nasal discharge
  • Otherwise normal energy, appetite, and temperature in mild cases
  • Symptoms typically begin 3–10 days after exposure
⚠️ Not classic kennel cough: Lethargy, fever, loss of appetite, or difficulty breathing alongside coughing suggests pneumonia or a more serious condition. See your vet same day.

Treatment at Home

For mild kennel cough in healthy adult dogs:

  • Rest and avoid exercise that triggers coughing
  • Switch to a harness instead of collar (collar pressure worsens coughing)
  • Use a humidifier or steam from a hot shower to ease irritation
  • Honey (1 teaspoon for medium dogs) can soothe throat irritation
  • Keep the dog away from other dogs for 14 days or until 2 weeks after coughing resolves

Most cases resolve on their own within 10–14 days.

When to See the Vet

  • Puppies under 6 months — more susceptible to serious complications
  • Senior or immunocompromised dogs
  • Brachycephalic breeds (Bulldogs, Pugs) — reduced airway reserve makes respiratory illness more serious
  • Symptoms lasting more than 3 weeks
  • Fever, lethargy, or loss of appetite alongside coughing
  • Breathing appears labored or dog is breathing with open mouth

Antibiotics (typically doxycycline) are sometimes prescribed to address the Bordetella component and may shorten duration and reduce complications. Cough suppressants are occasionally appropriate but should not be used without vet guidance — suppressing the cough in cases with mucus can worsen pneumonia risk.

Prevention

  • Bordetella vaccine: Reduces risk and severity. Available as intranasal, oral, and injectable forms. Required by most boarding facilities and doggy daycares.
  • DHPP vaccine: Covers Parainfluenza and Adenovirus-2, two components of kennel cough complex
  • Avoid high-density dog areas during local outbreaks
Key Takeaway: Kennel cough in a healthy adult dog is generally a 10–14 day inconvenience, not a crisis. Rest, harness instead of collar, and isolation from other dogs. See the vet if: puppies, seniors, or immunocompromised dogs are affected; breathing seems labored; or symptoms persist beyond 3 weeks.