Kennel cough — formally called Canine Infectious Respiratory Disease Complex (CIRD) — is the "common cold" of the dog world. It spreads rapidly wherever dogs congregate: boarding facilities, daycare, dog parks, training classes, and shelters. Most cases are mild and self-limiting, but some progress to life-threatening pneumonia, particularly in puppies, senior dogs, and immunocompromised patients.
What Causes Kennel Cough
CIRD is caused by multiple pathogens, often co-infecting simultaneously:
| Pathogen | Type | Vaccine Available? |
|---|---|---|
| Bordetella bronchiseptica | Bacteria | Yes (Bordetella vaccine) |
| Canine parainfluenza virus | Virus | Yes (in DA2PP) |
| Canine adenovirus-2 | Virus | Yes (in DA2PP) |
| Canine influenza (H3N2/H3N8) | Virus | Yes (separate flu vaccine) |
| Canine respiratory coronavirus | Virus | No |
| Mycoplasma | Bacteria | No |
| Streptococcus zooepidemicus | Bacteria | No |
Symptoms
- The classic cough: Harsh, dry, honking cough — often described as "sounds like a goose honking" or "something stuck in the throat." Triggered by excitement, pulling on collar, or drinking water.
- Retching/gagging at the end of coughing fits (owners often think the dog is trying to vomit)
- Mild cases: Cough only, normal energy, normal appetite
- Moderate cases: Cough + nasal discharge + mild lethargy
- Severe cases: Productive cough, fever, lethargy, loss of appetite, difficulty breathing (pneumonia)
Treatment
Mild Cases (Most Dogs)
- Supportive care — rest, good nutrition, hydration
- Use harness instead of collar (reduces tracheal irritation)
- Honey (1/2-1 tablespoon 2-3x daily) may soothe cough in adults
- Humidifier in sleeping area
- Isolate from other dogs for 10-14 days (contagious period)
- Most cases resolve within 7-14 days without medication
Moderate-Severe Cases
- Antibiotics: Doxycycline or amoxicillin-clavulanate for secondary bacterial infection/pneumonia
- Cough suppressants: Hydrocodone or butorphanol for severe nonproductive cough (do NOT suppress productive cough — it clears mucus)
- Anti-inflammatories: Short course for severe tracheal inflammation
- Nebulization: For pneumonia cases
When It's Serious
Prevention
- Bordetella vaccination: Intranasal, oral, or injectable. Required by most boarding facilities and daycares. Protects against one component — does not prevent all CIRD (multiple pathogens involved).
- Canine influenza vaccine: Recommended for dogs in high-density environments.
- Core vaccines (DA2PP): Protect against parainfluenza and adenovirus components.
- Avoid sick dogs: If you notice coughing dogs at a dog park or event, leave immediately.
Frequently Asked Questions
My dog is vaccinated for Bordetella but still got kennel cough. Did the vaccine fail?
Not necessarily. The Bordetella vaccine protects against one specific pathogen among many that cause CIRD. Your dog may have been infected by a different organism (parainfluenza, influenza, Mycoplasma). The vaccine also reduces severity even if infection occurs. No vaccine is 100% protective.
