Rabbit Snuffles and Pasteurella Multocida Infection: Diagnosis and Treatment

What “Snuffles” Really Means

“Snuffles” is the long-standing nickname for upper respiratory disease in rabbits. The signs — nasal discharge, sneezing, watery eyes, and a wet, matted face — are easy to recognize, but the underlying cause is more complicated than it first appears. The most common bacterial agent is Pasteurella multocida, although Bordetella bronchiseptica, Pseudomonas, Staphylococcus, and other organisms can also be involved alone or in mixed infections.

For owners, the key concept is that snuffles is rarely a simple cold. Once Pasteurella colonizes a rabbit’s nasal passages, it can spread to the middle ear (causing head tilt), the lacrimal duct (causing tear staining), the lower airway (causing pneumonia), and tooth roots (causing abscesses). An exotic-experienced veterinarian aims to suppress the bacterial load, support the rabbit’s immune system, and correct husbandry triggers that allow flares.

How Pasteurella Multocida Behaves in Rabbits

Pasteurella multocida is a small Gram-negative bacterium that lives commensally in the nasal passages of many healthy rabbits. Carriage rates are high in colony-housed rabbits and lower (but still common) in pet rabbits. The bacterium becomes a problem when host defenses are weakened.

Triggers for clinical disease include stress (moving, rehoming, surgery), inadequate ventilation in the rabbit’s environment, ammonia from soiled litter, ambient cold or sudden temperature changes, concurrent dental disease, immunosuppression, and other infections (including Encephalitozoon cuniculi). Once disease appears, Pasteurella can disseminate via direct extension along anatomic pathways or hematogenously.

That disseminated potential is why a “simple” runny nose in a rabbit must be taken more seriously than a runny nose in a dog or cat.

Clinical Presentations

Snuffles can appear in several recognizable forms. A rabbit may have one or several at the same time.

Upper Respiratory Infection

The classic form. Bilateral or unilateral nasal discharge that ranges from clear to thick yellow-green, sneezing, matted forepaws (from grooming the nose), and noisy breathing. Rabbits often paw at their faces in frustration.

Conjunctivitis and Dacryocystitis

Pasteurella can infect the conjunctiva or block and infect the nasolacrimal duct. Affected rabbits have tear staining, mucopurulent eye discharge, and sometimes a swollen lower lid. Flushing the nasolacrimal duct is part of the workup.

Otitis Media and Interna

When Pasteurella reaches the middle and inner ear, the rabbit develops head tilt, nystagmus, ataxia, or rolling. Bacterial otitis is one of the main differentials for E. cuniculi vestibular disease — covered in the broader head tilt overview.

Pneumonia

Lower respiratory infection appears as increased respiratory rate or effort, exercise intolerance, anorexia, and a bluish tinge to the lips and ears in severe cases. Pneumonia in rabbits is a life-threatening emergency.

Dental and Facial Abscesses

Pasteurella commonly seeds abscesses around tooth roots and in the jaw — connections that are explored in depth in the rabbit dental disease overview.

Genital Tract Infection

Less common but recognized: orchitis in bucks and metritis or pyometra in does. These can present as decreased appetite and lethargy without obvious external signs.

Signs That Warrant a Same-Day Exotic Vet Visit

Call an exotic-experienced veterinarian the same day if you notice:

• Persistent nasal discharge for more than a day or two
• Matted forepaws (a sign the rabbit has been wiping the nose repeatedly)
• Any change in breathing rate, effort, or noise
• Tear staining or mucopurulent ocular discharge
• Head tilt, rolling, or any neurologic sign
• Lethargy, reduced appetite, or any reduction in fecal pellets — these may signal early GI stasis secondary to systemic illness

The Diagnostic Workup

A thorough workup distinguishes Pasteurella from other causes and identifies extra-nasal involvement. A typical sequence at an AEMV-affiliated or ABVP-Exotic Companion Mammal certified exotic vet might include:

• Detailed history. Husbandry, diet, environment, ventilation, recent stress, contact with other rabbits.
• Physical exam. Including otoscopic exam (some rabbits need sedation for a useful look), oral exam, and weight check.
• Deep nasal swab for culture and sensitivity. Superficial nasal swabs from the nostril rim often return contaminants and are unreliable. A deep swab — often performed under sedation — gives a clinically actionable result.
• Skull radiographs or CT. Identify nasal turbinate destruction, middle-ear involvement, dental root pathology, and pulmonary changes.
• Bloodwork. Complete blood count and chemistry panel to evaluate systemic involvement.
• Serology or PCR for E. cuniculi. Especially when neurologic signs are present.
• Nasolacrimal duct flush. If eye discharge is present, flushing clears the duct and obtains material for culture.

Treatment Options

Treatment is culture-guided whenever possible. Empiric antibiotic choices often fail because Pasteurella isolates differ in sensitivity, and many of the rabbit’s most useful antibiotic options are off-label.

Antibiotics

Commonly considered choices include enrofloxacin (often referenced in dog and cat formulations — see Baytril for dogs and Baytril for cats for background), trimethoprim-sulfa, and chloramphenicol. Dosing in rabbits is species- and weight-specific, and your exotic-experienced veterinarian will choose by culture, body weight, and concurrent disease. Treatment duration is usually weeks, not days, for chronic or disseminated infections.

Some antibiotics common in dogs and cats (oral beta-lactams, clindamycin, lincomycin, oral cephalosporins) can cause fatal enterotoxemia in rabbits and must be avoided. This is a critical reason to use an exotic-experienced veterinarian rather than a general practitioner unfamiliar with rabbit pharmacology.

Supportive Care

Nebulization with sterile saline or with prescribed adjuncts loosens secretions and improves comfort. NSAIDs control fever and pain. Subcutaneous fluids support hydration. Syringe feeding maintains gut motility and prevents secondary stasis.

Surgery

Surgical drainage of facial abscesses or middle-ear bullae may be required when antibiotics alone cannot reach the focus of infection. Bulla osteotomy is a procedure performed at referral exotic-surgery services.

Husbandry and Environmental Fixes

Antibiotics fail repeatedly if husbandry triggers are not corrected. The cornerstones of long-term control include:

• Excellent ventilation in the rabbit’s housing area — air should not smell of ammonia
• Frequent litter changes and use of low-dust, low-aromatic substrates
• Stable ambient temperature in the rabbit’s comfort range (approximately 60–70°F for most pet rabbits)
• Stress reduction — quiet area, predictable routine, no crowding
• Hay-first diet for dental health and immune support
• Separating new or unfamiliar rabbits until quarantined and health-checked

Control Versus Cure

An honest conversation with an exotic-experienced veterinarian usually includes the word “control” rather than “cure.” Many rabbits with chronic Pasteurella infection live full, comfortable lives but experience periodic flares triggered by stress, weather changes, or coexisting illness. The goal becomes minimizing flares, treating them aggressively when they occur, and protecting the rabbit from disseminated complications such as otitis or pneumonia.

Long-term plans often include intermittent recheck exams, periodic skull imaging in chronic cases, vigilance for dental disease that can both trigger and result from chronic infection, and a low threshold to escalate care during the cool, dry, or stressful seasons that tend to provoke flares.

When to Worry About Spread to Other Pets

Pasteurella multocida can occasionally cause disease in other species, including dogs, cats, and people (typically after a bite or scratch from a carrier animal). Pet rabbits are not a high-risk source of human pasteurellosis for healthy adults, but immunocompromised people should discuss risk with both their physician and an exotic-experienced veterinarian. Other rabbits in the household are the most vulnerable contacts.

When introducing a new rabbit to a household that already has rabbits, a sensible quarantine period (commonly two to four weeks) in a separate room with separate handling equipment reduces the risk of importing an active Pasteurella strain. During quarantine, watch the new rabbit closely for any nasal discharge, sneezing, or matted forepaws. A clean physical exam at an exotic-experienced veterinarian before integration is a reasonable extra step, especially when the resident rabbit is older or has chronic disease.

Bonding two rabbits is a different exercise from quarantine. Even after a clean health screen, the bonding process itself is stressful, and stress can trigger a flare in a previously asymptomatic carrier. Build the bond gradually, watch each rabbit’s fecal pellet output and appetite during the process, and treat any sign of stasis or respiratory change as a reason to slow down.

Monitoring at Home Between Vet Visits

Rabbits with chronic Pasteurella benefit enormously from attentive home monitoring. A weekly home check that catches subtle change is often what allows an exotic vet to intervene before a flare becomes a crisis. Useful at-home monitoring includes:

• Weekly weight checks on a kitchen scale, recorded in a notebook or app
• Daily inspection of the nose, eyes, and forepaws for discharge or matting
• Daily count of fecal pellets in the litter box (volume, size, and shape all matter)
• Appetite tracking — hay first, then pellet ration, then greens
• Respiratory rate observations when the rabbit is at rest
• Twice-yearly recheck appointments even when the rabbit looks stable

Rabbits with concurrent dental disease, weight gain, or aging-related arthritis tend to have more frequent respiratory flares. Addressing those concurrent conditions is part of long-term respiratory control.

Frequently Asked Questions

Can rabbit snuffles be cured permanently?

Some early, mild cases respond to a single antibiotic course and never recur. Many chronic infections are managed lifelong with flare treatments and husbandry control. Setting realistic expectations early helps.

Should I separate a snuffly rabbit from healthy housemates?

Yes, during active flares. Many bonded pairs share the same Pasteurella strain already, but new exposures, asymptomatic carriers, and stressed housemates do better when temporarily separated. Discuss specifics with your exotic vet.

Are there vaccines against Pasteurella for pet rabbits?

No approved vaccine for pet rabbits is currently in routine use in most regions. Prevention rests on husbandry, stress reduction, and quarantine of new rabbits.

Why did the antibiotic from my regular vet not work?

Often because Pasteurella isolates vary in sensitivity, and some commonly prescribed antibiotics are unsafe in rabbits. Culture-guided selection by an exotic-experienced veterinarian dramatically improves outcomes.

Can I get sick from my rabbit’s snuffles?

Healthy adults are at very low risk from casual contact. Bites and scratches occasionally seed local infection. Immunocompromised people should discuss risk with their physician and consider gloves for litter changes.