How to tell if a rabbit is in pain: signs every owner should know
Veterinary warning — If you suspect your rabbit is in pain, consult a rabbit-savvy vet promptly. Never attempt to administer pain relief without a prescription. This guide helps recognise the signs but does not replace a clinical examination.
Rabbits are prey animals by nature. In the wild, showing weakness attracts predators — which is why domestic rabbits instinctively mask pain, sometimes until a very advanced stage. Unlike a dog that whimpers or a cat that vocalises, a rabbit often suffers in silence. Learning to recognise the subtle signals it gives is one of the most important skills a caring owner can develop.
The Rabbit Grimace Scale: a practical tool
Animal welfare researchers have developed a scientifically validated Rabbit Grimace Scale (RGS) to assess acute pain in rabbits. It is based on 5 facial criteria:
| Criterion | No pain (0) | Mild pain (1) | Severe pain (2) |
|---|---|---|---|
| Orbital tightening | Eyes fully open | Slightly half-closed | Eyes very closed, squinted |
| Cheek flattening | Whiskers relaxed, spread out | Slightly grouped | Very grouped, cheeks tense |
| Ear position | Upright, forward-facing | Slightly folded back | Strongly flattened backwards |
| Nose position | Flat, at rest | Slightly raised | Wrinkled, raised |
| Head position | Normal, head up | Slightly tilted forward | Head lowered, chin to chest |
A high cumulative score (2 on multiple criteria) indicates significant pain. Even without memorising this scale, getting used to observing your rabbit’s face daily allows you to detect changes quickly.
Behavioural signs of pain
Posture and mobility
- Hunched posture, rounded back: the rabbit curls in on itself, as if protecting its abdomen
- Tense sphinx posture: sitting but with a rigid body and flat ears — different from a relaxed resting position
- Retreating to a corner: hiding, not coming to greet you as it normally would
- Reduced movement: staying still where it would normally move freely; avoiding jumping or climbing
Abnormal behaviours
- Pain bruxism: loud, irregular teeth grinding (distinct from the soft tooth purring of contentment) — see our dedicated guide on why a rabbit grinds its teeth
- Sudden flopping to one side: can indicate intense abdominal pain (possible sign of GI stasis)
- Looking at or trying to bite its belly: sign of digestive pain
- Repeatedly getting up and lying down: discomfort preventing a comfortable resting position
- Unusual aggression: a normally gentle rabbit that bites or grunts when touched may be in pain at the point of contact
- Overgrooming or self-mutilation: excessive scratching or nibbling at a specific area — localised scratching can also point to a skin or parasite problem rather than pain (see rabbit moulting: normal or a problem)
Vegetative signals
- Rapid breathing at rest: an elevated respiratory rate without exertion or heat suggests acute pain
- Teeth chattering: a sharp, repeated clicking sound, distinct from bruxism
- Whimpering or screaming: rare in rabbits but extremely serious when they occur — immediate veterinary emergency
Physical signs to observe
- Anorexia: the rabbit no longer touches its hay, greens, or pellets. In rabbits, 12 hours without eating is a potential digestive emergency
- Absent or very small, misshapen droppings: possible sign of abdominal pain reducing gut motility
- Half-closed eyes when not sleeping: see the Grimace Scale above
- Visible weight loss in a few days: suggests the pain has been present for some time
- Dropping food while eating: can indicate dental pain (malocclusion, abscess)
For situations where your rabbit has stopped eating, see our dedicated article.
Acute pain vs chronic pain
| Acute pain | Chronic pain |
|---|---|
| Sudden onset | Gradual progression |
| Pronounced protective postures | Subtle behavioural changes |
| Loud bruxism | Slight reduction in activity, withdrawal |
| Obvious crisis | Can be mistaken for normal ageing |
| Immediate emergency | Progressive but essential management |
Chronic pain (arthritis, progressive dental malocclusion, abscesses) is often the most difficult to detect because the rabbit adapts slowly. A rabbit that seems “just less active” over the past few weeks deserves a veterinary consultation.
Commonly painful areas in rabbits
- Abdomen: digestive pain (stasis, gas, obstruction) — frequent emergencies
- Teeth and jaw: malocclusion, abscesses — especially common in dwarf breeds
- Legs and joints: arthritis (rabbits over 5–6 years), fracture, sore hocks — also check for overgrown nails, which hamper the foot’s stance
- Back: spondylosis, disc disease — often under-diagnosed
- Eyes and ears: abscesses, infections, otitis, ear mites, conjunctivitis
When to seek emergency care
Consult a rabbit-savvy vet within a few hours if your rabbit:
- Has not eaten for more than 8–12 hours
- Is grinding its teeth loudly and repeatedly
- Has flopped to one side and cannot get up normally
- Is bleeding or having convulsions
- Is breathing very rapidly at rest
- Is screaming or whimpering
To know exactly which signs mean calling within the hour and which justify a quick appointment, use our guide on when to see an exotic vet for your rabbit. To interpret these signs, remember that any clear behaviour change in a rabbit deserves close monitoring. On the other hand, a rabbit that voluntarily lies on its side with relaxed limbs and gets up normally at the slightest sound is generally not affected: see our article on rabbit resting postures to tell the two apart.
Veterinary sources and caution notes
The sources below are provided as veterinary or institutional reference points to frame the topic cautiously: this article can help you recognise possible signs, but it does not replace an examination by a rabbit-savvy veterinarian. If you are unsure, or if your rabbit shows pain, lethargy, refusal to eat, abnormal breathing, or rapidly worsening signs, contact a veterinary clinic without delay.
Sources used to frame the recommendations:
- RSPCA — Rabbit health and welfare
- VCA Hospitals — Gastrointestinal stasis in rabbits
- VCA Hospitals — Dental disease in rabbits
- Merck Veterinary Manual — Digestive disorders of rabbits
- Merck Veterinary Manual — Viral diseases of rabbits
- WOAH — Rabbit haemorrhagic disease
Frequently asked questions
Why does a rabbit hide pain?
It is a survival mechanism inherited from the wild. An animal that shows weakness attracts predators, so rabbits instinctively mask their symptoms — sometimes until a very advanced stage. Owners need to learn to read subtle signals rather than waiting for obvious manifestations.
My rabbit is grinding its teeth — is that pain?
It depends on the sound. A soft, rhythmic grinding (tooth purring), sometimes accompanied by a gentle jaw vibration, signals contentment and relaxation. A loud, irregular, dry grinding (pain bruxism) is an alarm signal — often associated with digestive, dental, or abdominal pain.
My rabbit has stopped eating — does that mean it is in pain?
Not necessarily, but anorexia is always a serious sign. A rabbit that stops eating may be in pain (digestive, dental, muscular), but may also be stressed, feverish, or developing GI stasis. See a rabbit-savvy vet within 12–24 hours if anorexia persists.
Can I give my rabbit a painkiller?
No — never without a veterinary prescription. Human painkillers (ibuprofen, paracetamol, aspirin) are toxic to rabbits. Only a vet can prescribe appropriate analgesics (meloxicam, buprenorphine, etc.).