Kennel Cough Explained: How Long Does the Honking Last?

Kennel Cough (Canine Infectious Tracheobronchitis) is a highly contagious upper respiratory infection producing a characteristic dry, honking cough that owners frequently mistake for choking or vomiting. The sound is alarming but the condition is generally mild and self-limiting in healthy adult dogs.

In puppies, senior dogs, or immunocompromised animals, however, kennel cough can progress to life-threatening pneumonia. Knowing when home management is appropriate and when veterinary attention is needed is important for all dog owners.

What is Kennel Cough?

“Kennel Cough” is a catch-all term for a highly contagious upper respiratory infection. It is not caused by a single bug. It is usually a complex mix of:

• Viruses: Canine Parainfluenza, Adenovirus Type 2, Distemper.
• Bacteria: Bordetella bronchiseptica is the most common bacterial culprit.

How They Get It: It is airborne. When an infected dog coughs, sneezes, or even barks, they release microscopic droplets containing the virus/bacteria. Your dog can catch it simply by:

1. Direct Contact: Touching noses or sharing water bowls at the park.
2. Airborne Transmission: Walking through an invisible cloud of germs left by another dog minutes earlier.
3. Contaminated Surfaces: Sniffing a toy, stick, or fence post where a sick dog coughed.

The Incubation Period: Symptoms typically appear 3 to 10 days after exposure. This means your dog could have picked it up at daycare last week and is only coughing now.

The Symptoms: More Than Just a Cough

1. The “Honk”: The hallmark sign. It is a dry, harsh, hacking cough that often ends with a gag or retch. Owners frequently mistake this for vomiting or choking.
2. White Foam: The retching often brings up a small amount of white, foamy phlegm or mucus. This is from the throat, not the stomach.
3. Tracheal Sensitivity: If you gently touch their throat or they pull on the leash, they immediately start coughing. The trachea is raw and inflamed.
4. Sneezing & Eye Discharge: Clear, watery discharge from the nose and eyes is common with viral infections.
5. Energy Level: In mild cases, the dog acts completely normal between coughing fits. They eat, drink, and remain active.

Home Care: Soothing the Savage Cough

If your dog is alert, eating well, and acting energetic, you can usually manage mild Kennel Cough at home without antibiotics.

1. Honey (Nature’s Cough Syrup)

Honey has natural antibacterial and soothing properties.

• Dose: 1/2 to 1 teaspoon of honey (Manuka is best, but regular is fine) mixed with a little warm water or given directly.
• Frequency: 3-4 times a day.
• Warning: Do not give honey to diabetic dogs or very young puppies.

2. Steam Therapy (Coupage)

Steam helps loosen the mucus in the chest and throat.

• How: Take your dog into the bathroom with you while you shower. Let the room fill with steam for 10-15 minutes.
• Coupage: Gently pat their chest with a cupped hand to help break up congestion.

3. Rest & Isolation

• No Exercise: Running and heavy breathing dry out the throat and trigger coughing fits. Keep walks short and slow (potty only).
• No Collars: Switch to a harness immediately. A collar puts pressure on the inflamed trachea.
• Quarantine: Your dog is highly contagious for up to 3 weeks after symptoms stop. Do not go to the dog park, groomer, or pet store. You are responsible for stopping the spread.

4. Hydration

Encourage drinking. Add low-sodium chicken broth to their water or feed wet food to increase moisture intake. A dry throat is an itchy throat.

When to See a Vet: The Red Flags

Kennel Cough can progress to Pneumonia, which is a medical emergency. Go to the vet if:

• Lethargy: The dog won’t get up, won’t play, or seems depressed.
• Loss of Appetite: Refusing food is a major warning sign.
• Green/Yellow Discharge: Thick, colored mucus from the nose or eyes indicates a secondary bacterial infection.
• Rapid Breathing: If they are breathing fast (over 30 breaths/min) while resting, their lungs are struggling.
• Fever: Rectal temperature over 103°F.
• Puppies/Seniors: Their immune systems are weaker. Don’t wait; go to the vet at the first cough.

Treatment: The vet may prescribe:

• Antibiotics: (e.g., Doxycycline) to kill the Bordetella bacteria.
• Cough Suppressants: (e.g., Hydrocodone) to stop the cough so they can sleep.
• Anti-inflammatories: To reduce throat swelling.

The Vaccine Debate: Is it Worth It?

The Bordetella Vaccine (intranasal, oral, or injectable) is often required by boarding facilities.

• Is it 100% Effective? No. Just like the human flu shot, it covers the most common strains but not all of them.
• Why Get It? Vaccinated dogs usually have much milder symptoms and recover faster (3-5 days vs. 3 weeks). It significantly reduces the risk of deadly pneumonia.
• Frequency: It is typically given every 6-12 months depending on risk.

Frequently Asked Questions (FAQ)

Can cats or humans catch Kennel Cough from my dog? Generally, humans and cats cannot catch the typical viral strains of Kennel Cough from dogs. However, Bordetella bronchiseptica, the primary bacterial culprit, is considered zoonotic, meaning it can infect humans and felines in very rare cases. This is primarily a risk only if the human has a severely compromised immune system. Otherwise, isolating the sick dog from other dogs is the main concern.

Is it okay to use over-the-counter human cough medicine? Never give your dog human cough medicine, like Robitussin, without explicit and direct dosage instructions from your veterinarian. Many human cold medications contain decongestants (like pseudoephedrine) or artificial sweeteners (like xylitol) that are highly toxic and potentially fatal to dogs. Stick to natural remedies like honey and steam therapy unless directed otherwise by your vet.

Summary

• Typical course: Mild kennel cough in healthy adult dogs resolves in 1–3 weeks with supportive care.
• Home management: Rest, a harness instead of collar, honey, steam therapy, and increased hydration support recovery.
• Quarantine: Dogs remain contagious for up to 3 weeks after symptoms resolve. Avoid dog parks, groomers, and boarding during this period.
• Veterinary signs: Lethargy, loss of appetite, colored nasal or eye discharge, rapid breathing, fever, or any cough in puppies or seniors warrants prompt veterinary evaluation.
• Vaccination: The Bordetella vaccine reduces symptom severity and recovery time even when it does not prevent infection entirely.