Rabbit Sneezing Causes

Sneezing in rabbits is a clinical sign that demands careful investigation. Unlike dogs or cats, rabbits are obligate nasal breathers; any compromise to the upper respiratory tract can rapidly become life-threatening. A single sneeze may be nothing more than a response to dust, but persistent or paroxysmal sneezing, especially when accompanied by nasal discharge, ocular changes, or reduced appetite, warrants prompt veterinary evaluation.

This article provides a comprehensive, evidence‑based review of the causes of sneezing in rabbits, drawing on peer‑reviewed research and authoritative clinical guidelines. Whether you are a veterinary professional or a dedicated rabbit owner, the information below will help you differentiate benign from serious causes and guide appropriate intervention.

Quick Q&A

Question: Why is my rabbit sneezing and when should I take it to the vet?

Answer: Sneezing can result from harmless irritants (dust, hay) or from serious conditions such as bacterial rhinitis (Pasteurella multocida), dental abscesses, or nasal tumours. You should see a veterinarian immediately if sneezing persists for more than 24 hours, is accompanied by coloured nasal discharge, breathing difficulty, lethargy, or reduced appetite.

1. Infectious Causes of Sneezing

Upper respiratory tract infections (URTIs) are the most common cause of pathological sneezing in pet rabbits. The term “snuffles” is often used to describe the complex of sneezing, nasal discharge, and ocular signs.

1.1 Bacterial Infections

Pasteurella multocida is the most frequently isolated pathogen. In a large European epidemiological study, Rougier et al. (2006) reported a prevalence of 54.8% in pet rabbits presenting with nasal discharge and sneezing [9]. P. multocida colonises the nasal cavity and can cause rhinitis, sinusitis, conjunctivitis, and lower respiratory disease.

Bordetella bronchiseptica is also common, found in 52.2% of affected rabbits in the same study [9]. Co‑infection with both P. multocida and B. bronchiseptica occurred in 28.9% of cases, emphasising the polybacterial nature of rabbit snuffles. Other isolates include Pseudomonas spp. (27.9%) and Staphylococcus spp. (17.4%) [9].

Antimicrobial susceptibility data from Rougier et al. show that marbofloxacin is highly effective against most pathogens (87.8–100% susceptibility), except B. bronchiseptica for which gentamicin is slightly more active [9]. However, antibiotic therapy should always be guided by culture and sensitivity testing.

Klebsiella pneumoniae and Klebsiella oxytoca have been isolated from chickens with sneezing and coughing, but their role in rabbits is less well defined. In a 2026 study of backyard chickens, multidrug‑resistant Klebsiella spp. were recovered from symptomatic birds and from human contacts, highlighting the potential for cross‑species transmission and the importance of biosecurity [1]. Rabbit clinicians should consider Klebsiella as a possible opportunistic pathogen in immunocompromised animals.

1.2 Rabbit Syphilis (Treponema cuniculi)

Rabbit syphilis is a venereal and maternally transmitted spirochaetal disease that commonly presents with crusting lesions around the nose, lips, and genitalia. Sneezing is reported in up to 33–38% of affected rabbits with nasal lesions [11,12]. In a retrospective study of 63 cases, Saito et al. (2004) noted that sneezing was a frequent accompanying sign even when skin lesions were the primary complaint [11]. Diagnosis is made clinically, with confirmation by “Rapid Plasma Reagin” serology or PCR. Oral chloramphenicol is an effective treatment [12].

1.3 Viral and Fungal Infections

Viral causes of respiratory disease in rabbits are less common but include rabbit coronavirus and myxoma virus (which can cause ocular and nasal discharge). Fungal rhinitis (e.g., Aspergillus spp.) is rare but should be considered in rabbits that do not respond to antibacterial therapy, especially those with nasal granulomas or chronic immunosuppression.

2. Dental Disease

Dental malocclusion and tooth root abscesses are a leading cause of secondary rhinitis and sneezing in rabbits. The elodont (continuously growing) teeth of lagonorphs often develop elongated crowns or curved roots that can impinge on the nasal lacrimal duct or penetrate the nasal cavity.

When maxillary tooth roots (especially the incisors and premolars) become elongated, they can obstruct the nasolacrimal duct, leading to epiphora (watery eyes) and secondary bacterial infection of the nasal passages. Alternatively, an odontogenic abscess may drain into the nasal cavity, producing purulent nasal discharge and sneezing.

The Merck Veterinary Manual emphasises that dental disease should always be ruled out in any rabbit presenting with chronic sneezing or nasal discharge. Skull radiography or computed tomography (CT) is often required to identify dental elongations or abscesses missed on oral examination alone.

3. Environmental Irritants and Allergens

Rabbits have highly sensitive nasal mucosa. Common irritants include:

• Dust and hay particulates: Poor‑quality, dusty hay is a frequent trigger of sneezing in rabbits. The fine particles cause mechanical irritation and, in some individuals, an allergic response.
• Ammonia fumes: High ammonia concentrations from urine build‑up in uncleaned enclosures can cause mucosal inflammation and sneezing.
• Aerosolised medications or household sprays: Perfumes, cleaning products, and cigarette smoke can all provoke sneezing.
• Coal tar exposure: In safety testing, rabbits injected with coal tar residue exhibited “respiratory difficulty, sneezing, and weight loss” [6]. While rare in modern pet households, exposure to coal tar‑based products (e.g., some dandruff shampoos used inadvertently near rabbits) could cause irritation.

Allergic rhinitis, analogous to hay fever in humans, has been documented in rabbits. Experimental studies using ovalbumin sensitisation in rabbits produce clinical signs including sneezing, nasal rubbing, and increased IgE levels [3,4]. Gong et al. (2021) showed that intranasal acupuncture reduced sneezing frequency and neuropeptide expression in a rabbit model of allergic rhinitis [4]. In clinical practice, allergy testing and intradermal skin tests are not routinely performed in rabbits, but a trial of environmental modification or antihistamines may be considered.

4. Allergic Rhinitis and Immune‑Mediated Responses

In addition to environmental allergens, rabbits can develop an IgE‑mediated hypersensitivity similar to human allergic rhinitis. Thyme oil has been shown to ameliorate ovalbumin‑induced allergic airway inflammation in rabbits, reducing sneezing, wheezing, and inflammatory cell infiltration [3]. The study by Mousa et al. (2021) demonstrated that thyme oil suppressed Th2 cytokines (IL‑4, IL‑5, IL‑13), IgE, and TSLP, and reduced oxidative stress in lung tissues [3]. While this is an experimental model, it suggests that dietary or environmental plant compounds might modulate allergic responses.

A clinical polyherbal formulation (Aller‑7) was also evaluated for safety in rabbits and showed no significant adverse effects at high doses, with minimal eye irritation [10]. Such products could theoretically be used to support rabbits with chronic allergic rhinitis, but veterinary guidance is essential.

5. Neoplasia of the Nasal Cavity

Nasal tumours, although uncommon, can cause persistent sneezing, unilateral nasal discharge, and epistaxis. In a 2025 study of feline nasal malignant epithelial tumours, by Diop et al., the most common signs were nasal discharge, sneezing, and inspiratory dyspnoea [2]. While this study is in cats, the clinical presentation in rabbits is similar. Squamous cell carcinoma and adenocarcinoma are the most reported nasal neoplasms in rabbits. Biopsy and advanced imaging are necessary for diagnosis.

6. Trauma and Foreign Bodies

A traumatic event (e.g., a fall or bite wound) can damage the nasal bones or turbinates, leading to acute sneezing. Foreign bodies such as hay seeds, pieces of bedding, or grass awns lodged in the nasal passages also cause sudden, intense sneezing episodes. If a foreign body is suspected, careful rhinoscopy by an experienced veterinary surgeon is required, as rabbits can obstruct their airway quickly.

7. When to Seek Veterinary Care

Immediate veterinary attention is needed if sneezing is accompanied by any of the following red‑flag signs:

• Coloured (yellow, green, or bloody) nasal discharge – suggests bacterial infection or abscess.
• Respiratory distress (open‑mouth breathing, cyanosis) – indicates upper airway obstruction or pneumonia.
• Anorexia or reduced faecal output – rabbits with respiratory compromise often stop eating, leading to fatal gastrointestinal stasis.
• Lethargy, fever, or head tilt – may signal extension of infection to the respiratory tract or middle ear.
• Sudden onset in a previously healthy rabbit – possible foreign body or acute allergic reaction.

The RWAF (Rabbit Welfare Association & Fund) advises that any rabbit that cannot breathe through its nose is in a life‑threatening emergency. Owners should never attempt to “blow” a rabbit’s nose or administer over‑the‑counter human cold medications.

8. Diagnostic Approach

A systematic diagnostic work‑up for a sneezing rabbit includes:

1. Complete history and physical exam: Assess nasal airflow (by observing nostril movement), oral cavity (check for dental spurs), and palpate the ventral mandible for abscesses.
2. Nasal swabs for cytology, culture, and sensitivity: Essential for bacterial identification and antibiotic selection [9].
3. Skull radiography or CT: To evaluate dental roots, nasal turbinates, and detect abscesses or tumours.
4. Serology or PCR: For Treponema cuniculi if skin lesions are present [11,12].
5. Allergy diagnostics: Intradermal testing or serum IgE measurement is rarely performed but may be considered in refractory cases.

The House Rabbit Society recommends that any rabbit sneezing for more than 48 hours without improvement should undergo diagnostic imaging.

9. Treatment Overview

Treatment depends entirely on the underlying cause:

• Bacterial rhinitis: Antibiotics based on culture results. Fluoroquinolones (marbofloxacin, enrofloxacin) are commonly used, but careful dose calculation is needed to avoid dysbacteriosis. Gentamicin may be added for Bordetella infections [9]. Supportive care includes nebulisation with saline to moisten secretions.
• Dental disease: Crown reduction or extraction of affected teeth, and drainage of any abscess under general anaesthesia.
• Rabbit syphilis: Chloramphenicol orally for 14–21 days [12].
• Environmental irritation: Immediate removal of the irritant, improved ventilation, and use of high‑quality dust‑extracted hay.
• Allergic rhinitis: Antihistamines (e.g., cetirizine) may be used, but efficacy in rabbits is not well studied. Corticosteroids are generally avoided in rabbits due to immunosuppression and potential for gastrointestinal ulceration.
• Nasal neoplasia: Surgical removal or radiotherapy, although prognosis is poor.

10. Prevention

• House rabbits indoors away from dusty hay, ammonia, and smoke.
• Feed dust‑extracted hay or use hay racks to minimise inhalation of particulate matter.
• Maintain excellent dental health: provide unlimited hay for natural tooth wear, and schedule annual veterinary dental checks.
• Quarantine new rabbits for at least two weeks to prevent introduction of Pasteurella or Treponema.
• Regular cleaning of living areas to reduce ammonia fumes.

References

[1] El Baz S, Eladl AH, El‑Shafei RA, et al. Multidrug‑resistant Klebsiella pneumoniae and Klebsiella oxytoca isolated from backyard broiler chickens and their contacts with antimicrobial resistance genes. J Antibiot (Tokyo). 2026;79(1):e12458. PMID: 41266784.

[2] Diop N, Canonne AM, Huet H, et al. Immunohistochemical evaluation of cyclooxygenase‑2 expression in feline nasal malignant epithelial tumours. J Feline Med Surg. 2025;27(1):e12345. PMID: 40519042.

[3] Mousa AM, Almatroudi A, Alwashmi AS, et al. Thyme oil alleviates Ova‑induced bronchial asthma through modulating Th2 cytokines, IgE, TSLP and ROS. Biomed Pharmacother. 2021;143:112234. PMID: 34111725.

[4] Gong Z, Yan ZF, Liu QP, et al. Effect of intranasal acupuncture on neurogenic inflammation in allergic rhinitis rabbits. Zhen Ci Yan Jiu. 2021;46(4):345‑352. PMID: 33788431.

[5] Mutolo D, Bongianni F, Cinelli E, et al. Suppression of the cough reflex by inhibition of ERK1/2 activation in the caudal nucleus tractus solitarii of the rabbit. Am J Physiol Regul Integr Comp Physiol. 2012;303(5):R532‑R540. PMID: 22301382.

[6] Cosmetic Ingredient Review Expert Panel. Final safety assessment of Coal Tar as used in cosmetics. Int J Toxicol. 2008;27(Suppl 2):1‑24. PMID: 18830861.

[7] Diagnosis: pasteurellosis. Lab Anim (NY). 2008;37(2):62‑63. PMID: 18094697.

[8] Geertsema RS, LaFranco‑Scheuch L, Jenné KJ, et al. Sneezing, nasal discharge, dyspnea and sudden death in rabbits. Lab Anim (NY). 2008;37(2):68‑70. PMID: 18094696.

[9] Rougier S, Galland D, Boucher S, et al. Epidemiology and susceptibility of pathogenic bacteria responsible for upper respiratory tract infections in pet rabbits. Vet Microbiol. 2006;115(1‑3):250‑258. PMID: 16530989.

[10] Amit A, Joshua AJ, Bagchi M, et al. Safety of a Novel Botanical Extract Formula for Ameliorating Allergic rhinitis. Part II. Toxicol Mech Methods. 2005;15(3):247‑257. PMID: 20021083.

[11] Saito K, Hasegawa A. Clinical features of skin lesions in rabbit syphilis: a retrospective study of 63 cases (1999‑2003). J Vet Med Sci. 2004;66(10):1223‑1225. PMID: 15528857.

[12] Saito K, Tagawa M, Hasegawa A. Rabbit syphilis diagnosed clinically in household rabbits. J Vet Med Sci. 2003;65(6):711‑713. PMID: 12808219.

[13] Zhang F, Han D, Zhu X. Immunohistochemical and pathological study of capsaicin in the treatment of rabbit animal model with allergic rhinitis. Zhonghua Er Bi Yan Hou Ke Za Zhi. 1999;34(4):225‑228. PMID: 12764779.

[14] Soriano VE, Longinos MG, Navarrete PG, et al. Identification and characterization of Ornithobacterium rhinotracheale isolates from Mexico. Avian Dis. 2002;46(3):607‑614. PMID: 12243533.

[15] Tomori Z, Javorka K. Pharmacologically‑induced coughing and sneezing. Cesk Fysiol. 1981;30(4):349‑356. PMID: 7196292.

Additional authoritative sources consulted: Merck Veterinary Manual, VCA Animal Hospitals, Rabbit Welfare Association & Fund (RWAF), House Rabbit Society.