Kennel Cough in Dogs: A Complete Guide
Kennel cough — formally known as infectious tracheobronchitis — is one of the most common infectious respiratory diseases of dogs. Highly contagious and capable of spreading rapidly wherever dogs socialise, it can affect dogs of any age or breed. While most cases are self-limiting, understanding kennel cough — its causes, spread, treatment, and prevention — is important for all dog owners, particularly those who travel in Europe with their pets.
What Causes Kennel Cough?
Kennel cough is not caused by a single pathogen but by a complex of infectious agents that can act alone or together. The most important are:
- Bordetella bronchiseptica — a bacterium that is the most commonly identified causative agent; highly contagious and able to survive on surfaces for several days
- Canine parainfluenza virus (CPiV) — a respiratory virus that frequently acts synergistically with Bordetella to cause more severe disease
- Canine adenovirus type 2 (CAV-2) — included in standard canine vaccination programmes; contributes to the kennel cough complex
- Canine respiratory coronavirus
- Mycoplasma cynos — associated with more severe lower respiratory tract disease
Transmission occurs through direct dog-to-dog contact, aerosol droplets from coughing, and contact with contaminated surfaces. Dogs are most contagious in the period immediately before and during active coughing.
Where Is It Spread?
Any environment where dogs congregate carries a risk of kennel cough transmission:
- Boarding kennels and catteries
- Dog parks and off-lead exercise areas
- Grooming salons
- Veterinary practices (particularly waiting rooms)
- Training classes
- Dog shows and competitions
Symptoms
The characteristic sign of kennel cough is a harsh, honking cough that can sound alarming to owners — sometimes described as resembling a goose honk or the sound of something stuck in the throat. Other signs include:
- A honking or harsh, dry cough — often worse after exercise or excitement, and at night
- Retching or gagging at the end of a coughing fit, sometimes bringing up white foamy material
- Sneezing and nasal discharge
- Eye discharge
- Mild lethargy
In uncomplicated cases, appetite and energy levels are usually maintained. The incubation period is typically three to five days, and most healthy adult dogs recover within two to three weeks without treatment.
When Does Kennel Cough Become Serious?
In some circumstances, kennel cough can progress to bacterial pneumonia, which requires prompt veterinary intervention. Warning signs that indicate a more serious infection include:
- Lethargy and significant reduction in energy
- Loss of appetite
- Fever
- Laboured or rapid breathing
- Productive cough with coloured discharge
Puppies under 12 weeks, elderly dogs, immunocompromised dogs, and brachycephalic breeds are at greatest risk of developing severe disease. These dogs should be assessed by a veterinarian at the first signs of respiratory infection.
Treatment
Most healthy adult dogs with mild kennel cough do not require antibiotic treatment — the condition resolves naturally. Supportive care at home includes:
- Rest — reduce exercise to short, gentle walks until the cough has resolved
- Avoiding smoky environments, dust, and other respiratory irritants
- Using a harness instead of a collar to avoid pressure on the inflamed trachea
- Honey — a small amount of manuka or raw honey can coat the throat and ease irritation; this is not a substitute for veterinary treatment but is a safe home remedy
- Humidifying the environment — a bowl of hot water near the dog's resting area can soothe an irritated airway
In more severe or prolonged cases, a veterinarian may prescribe antibiotics (doxycycline is commonly used for Bordetella), cough suppressants, and anti-inflammatories. Premium nutritional support during recovery with easily digestible food is available from ranges at Zooplus, which can help maintain condition in dogs that feel under the weather.
Vaccination Options
Vaccination is the most effective preventive measure and is widely recommended — and often required — for dogs entering kennels or attending classes. There are two main types of kennel cough vaccination available in Europe:
Intranasal Vaccine (Nobivac KC, Versican Plus Pi/Bb)
Administered directly into the nostrils, the intranasal vaccine contains live attenuated Bordetella bronchiseptica and parainfluenza virus. It induces local mucosal immunity in the respiratory tract — the first line of defence against infection. Protection begins within 72 hours and can last up to 12 months. This is the preferred option for dogs at high risk of exposure.
Injectable Vaccine
An injectable Bordetella vaccine is also available in some European markets. This requires two initial doses with a suitable interval and takes longer to provide protection. It may be preferred for dogs that find intranasal administration stressful.
Kennel Cough and EU Travel
When travelling within the European Union with your dog, you will need an EU Pet Passport documenting your dog's rabies vaccination and microchip. While kennel cough vaccination is not a legal requirement for EU travel, many kennels, pet accommodation providers, and dog training facilities across Europe require proof of recent Bordetella vaccination as a condition of entry. If you plan to use kennels during travel within Europe, arrange vaccination at least three to five days before entry to allow adequate immunity to develop.
If you are travelling from the UK following Brexit, you will need an Animal Health Certificate (AHC) rather than an EU Pet Passport; this must be issued by an Official Veterinarian within 10 days of travel. Again, kennel cough vaccination is advisable but not a legal requirement for the AHC.
Preventing Spread
Keep your coughing dog away from other dogs until fully recovered — typically two to three weeks after the cough resolves. Notify your kennel, groomer, or training class if your dog develops kennel cough shortly after a visit. Good hygiene — regular hand-washing and surface disinfection — reduces environmental persistence of the pathogen, particularly Bordetella, which can survive outside the host for several days.