Bordetellosis in Rabbits: Respiratory Infection and Snuffling Signs

Bordetellosis is a respiratory infection associated with Bordetella bronchiseptica, a bacterium that can live in the airways of rabbits. In some rabbits it causes no obvious problems, while in others it contributes to upper respiratory disease with sneezing, nasal discharge, and the familiar "snuffles" presentation. It may also be part of a mixed infection rather than the only germ involved.

In pet rabbits, respiratory disease is often more complicated than one bacteria acting alone. Sources for rabbit medicine note that Pasteurella multocida is a common cause of snuffles, and Bordetella is a recognized co-infection or contributing pathogen. That matters because a rabbit with a mild runny nose can worsen over time, especially if congestion interferes with normal breathing or eating.

Rabbits are obligate nasal breathers, so even what looks like a small amount of nasal swelling or discharge can matter more than it would in some other pets. If the nose becomes blocked, breathing can become stressful very quickly. That is why ongoing sneezing, crusting around the nostrils, or louder breathing deserves timely veterinary attention.

Bordetella bronchiseptica spreads through respiratory secretions and close contact. A rabbit may pick it up from another rabbit, from a crowded or poorly ventilated environment, or while already stressed by transport, illness, or recent changes in housing. Some rabbits may carry the organism without obvious signs, which means exposure does not always equal immediate illness.

In real life, Bordetella often acts alongside other problems. Rabbit respiratory disease may involve Pasteurella, Staphylococcus, or Pseudomonas, and noninfectious issues like dusty bedding, ammonia buildup from soiled litter, smoke exposure, or poor airflow can make the airways more vulnerable. Dental disease can also mimic or worsen nasal signs because tooth root problems may affect the nasal passages and tear ducts.

Young, elderly, or immunocompromised rabbits may have a harder time keeping bacteria under control. Stress matters too. A rabbit dealing with pain, poor diet, social conflict, or a dirty enclosure may be more likely to show clinical signs after exposure.

Your vet will start with a careful history and physical exam. That usually includes listening to the lungs, checking the nostrils and eyes, evaluating hydration and body condition, and looking for clues that point to dental disease or deeper infection. Because rabbits do not always show dramatic bloodwork changes with infection, diagnosis often depends heavily on the exam and targeted testing.

Testing may include cytology or culture from nasal or eye discharge, especially if symptoms are persistent or keep returning. Culture and sensitivity testing can help your vet choose an antibiotic more thoughtfully, although superficial swabs do not always reflect what is happening deeper in the nasal passages. Skull or chest radiographs may be recommended to look for pneumonia, sinus involvement, or tooth root disease.

For chronic, severe, or unclear cases, your vet may discuss advanced imaging such as CT. This can help sort out whether the main problem is infection, dental disease, a foreign body, a mass, or structural damage inside the nasal cavity. Diagnosis is often about identifying the full picture, not only naming one bacteria.

Prevention starts with air quality and husbandry. Keep your rabbit in a clean, well-ventilated space with low-dust hay storage, low-dust litter, and frequent removal of urine-soaked bedding. Ammonia, smoke, aerosols, and dusty environments can irritate the airways and make infection more likely to take hold.

Try to reduce stress where you can. Stable routines, good nutrition, enough space, and prompt treatment of dental disease or other painful conditions all support the immune system. If you bring home a new rabbit, quarantine first and watch closely for sneezing, discharge, or eye irritation before introductions.

There is not a routine, widely used Bordetella vaccine program for pet rabbits in the United States. For most pet parents, prevention is less about vaccination and more about smart housing, careful observation, and early veterinary care when signs begin. If one rabbit in the home develops respiratory signs, ask your vet how to handle separation, cleaning, and monitoring of other pets.