Dental disease is one of the most common health problems in pet rabbits and a leading trigger for GI stasis, the number one killer of domestic rabbits. Unlike humans, rabbits have open-rooted (continuously growing) teeth — all 28 teeth grow throughout their entire lives at a rate of approximately 2 to 3 mm per week. In healthy rabbits, this growth is offset by the constant grinding action of chewing hay and fibrous vegetation. When teeth do not wear evenly — due to genetic malocclusion, insufficient hay intake, metabolic bone disease, or trauma — the teeth overgrow and develop sharp points (spurs) that lacerate the tongue and cheeks, causing severe pain and inability to eat.
Overview
Rabbits have two types of teeth:
- Incisors — 6 total (4 upper including 2 small “peg teeth” behind the main upper incisors, and 2 lower). Used for cutting vegetation.
- Cheek teeth (premolars and molars) — 22 total. Used for grinding hay and fibrous food. These are the teeth most commonly affected by acquired dental disease.
Dental disease in rabbits falls into two categories:
- Congenital malocclusion — Genetic misalignment of the incisors, most common in dwarf and lop-eared breeds. The incisors fail to meet properly and overgrow, sometimes curling dramatically.
- Acquired dental disease — The most common form. Inadequate dietary fiber (insufficient hay) leads to reduced chewing and uneven tooth wear. Over time, molar spurs develop, roots elongate, and jaw abscesses can form. Metabolic bone disease (from low calcium, low vitamin D) can soften jaw bone and contribute.
Symptoms
Dental disease can be subtle in its early stages:
- Decreased appetite or selective eating (picking up food then dropping it, preferring soft foods over hay)
- Drooling or wet chin (“slobbers”)
- Weight loss
- Facial swelling or lumps along the jaw (indicating tooth root abscess)
- Eye discharge or tearing (maxillary tooth roots sit just below the eye orbit; elongated roots can cause tear duct obstruction or retrobulbar abscess)
- Decreased fecal pellet production (secondary GI stasis)
- Teeth grinding (bruxism) — indicates pain
- Reluctance to groom (matted fur, dirty bottom)
- Nasal discharge (if upper tooth roots are involved)
- Visible incisor overgrowth or asymmetry
Diagnosis
- Conscious oral examination — An otoscope or speculum allows limited visualization of the cheek teeth while the rabbit is awake. Can detect obvious spurs but misses early or posterior problems.
- Examination under sedation/anesthesia — The gold standard for thorough oral examination. Allows full visualization of all cheek teeth using a mouth speculum and light source. Essential for detecting spurs, elongated crowns, abscesses, and oral ulcers.
- Skull radiographs — Evaluate tooth root length, jaw bone density, periapical (root tip) abscesses, and overall dental arcade alignment. Multiple views (lateral, dorsoventral, oblique) are needed.
- CT scan — Provides detailed three-dimensional imaging of dental structures, abscesses, and bone involvement. The most sensitive imaging modality for rabbit dental disease. Available at referral centers.
Treatment & Medications
Dental Procedures
| Procedure | Purpose | Key Notes |
|---|---|---|
| Molar crown reduction (filing/burring) | Removes sharp spurs and restores normal crown height | Performed under anesthesia using a dental burr. Spurs are carefully filed down to restore a flat occlusal (chewing) surface. May need to be repeated every 4 to 12 weeks depending on severity. |
| Incisor trimming or extraction | Addresses incisor malocclusion | Incisors should NEVER be clipped with nail trimmers (this fractures the tooth, exposing the pulp to infection). Incisors should be burred under anesthesia or, for permanent resolution, extracted. Rabbits can eat well without incisors by using their lips to pick up food. |
| Abscess treatment — surgical debridement, packing, and prolonged antibiotics | Jaw abscesses from infected tooth roots | Rabbit dental abscesses are encapsulated by thick, caseous (cheese-like) pus that does not drain like dog/cat abscesses. Complete surgical removal of the abscess capsule with extraction of the affected tooth is the best approach. Antibiotic-impregnated beads may be placed in the wound. |
Medications
| Medication | Purpose | Key Notes |
|---|---|---|
| Meloxicam | NSAID pain management | Reduces pain and inflammation. Critical for encouraging the rabbit to eat. |
| Buprenorphine | Opioid for severe pain | Used post-procedure or for moderate to severe dental pain. |
| Enrofloxacin | Rabbit-safe antibiotic | For dental abscesses and secondary infections. |
| Trimethoprim-Sulfa | Alternative rabbit-safe antibiotic | Broad-spectrum option for infected dental disease. |
| Penicillin G (injectable) | For deep dental abscesses | Given by subcutaneous or intramuscular injection. Safe by injection (NOT oral). |
| Syringe feeding (Critical Care) | Nutritional support | Essential for rabbits unable to eat due to dental pain. Oxbow Critical Care provides fiber and nutrition via syringe. |
Prevention
- Unlimited grass hay — The single most important factor in dental health. Timothy, orchard grass, meadow, or oat hay should be available at all times. The lateral grinding motion of chewing hay provides the abrasive action needed to wear teeth evenly.
- Limited pellets — Pellets do not provide the same grinding action as hay. Limit to approximately 1/4 cup per 5 lbs body weight daily.
- Fresh leafy greens — Provide additional chewing exercise and nutrition.
- Regular veterinary dental exams — At least annually (more frequently for rabbits with known dental issues or predisposed breeds).
- Appropriate calcium and vitamin D — Ensures adequate jaw bone density. Hay and leafy greens provide dietary calcium; appropriate UV exposure or vitamin D supplementation supports calcium metabolism.
Prognosis
- Mild acquired dental disease — Good prognosis with regular dental trims and dietary correction (increased hay). Some rabbits stabilize with improved diet alone.
- Moderate dental disease requiring repeated burring — Fair prognosis. Many rabbits do well with regular (every 4 to 12 weeks) dental procedures, though the condition is progressive.
- Dental abscesses — Guarded prognosis. Rabbit dental abscesses are notoriously difficult to resolve and may require multiple surgeries and prolonged antibiotics. Some cases can be successfully managed; others are ultimately untreatable.
- Severe, advanced dental disease — Poor prognosis when multiple teeth are severely affected, bone is extensively remodeled, and quality of life cannot be maintained.
Frequently Asked Questions
Can dental disease be cured? Acquired dental disease is generally managed rather than cured. Once teeth have become misaligned, they tend to continue growing unevenly. However, increasing hay intake and regular dental care can slow progression and maintain quality of life.
Why is hay so important for rabbit teeth? Hay requires prolonged lateral chewing motion that wears down the cheek teeth evenly. Pellets, vegetables, and other soft foods are bitten and swallowed quickly without the sustained grinding action. Without hay, teeth overgrow rapidly.
How often does my rabbit need dental checks? Healthy rabbits should have dental exams at least annually. Rabbits with known dental disease may need exams and filings every 4 to 12 weeks depending on the rate of spur regrowth.
Are certain breeds more prone to dental disease? Yes. Dwarf breeds (Netherland Dwarf, Mini Lop, Holland Lop) have shortened skulls (brachycephalic) that predispose to incisor malocclusion and cheek tooth crowding. Larger breeds are generally less prone but are not immune.
Can rabbit teeth be extracted? Yes. Incisors can be extracted for permanent resolution of incisor malocclusion. Cheek teeth can be extracted when severely diseased or abscessed, though this is technically challenging. Rabbits can adapt well to missing teeth with appropriate dietary management.