🦷 Dental Health — Why Hay Is Non-Negotiable
Dental disease is the number one hidden trigger of GI stasis: tooth pain stops a rabbit from chewing hay → gut motility slows → stasis. Many owners think a rabbit "suddenly stopped eating" is a gut problem, when the root is in the teeth.
The only effective prevention is eating grass hay — which is why this site repeats "unlimited long-stem hay" as the first rule of rabbit keeping: it solves digestion and teeth at once.
Teeth that never stop growing
Rabbit teeth grow continuously, about 2 mm per week[1]. The full dentition is 28 teeth, including the small "peg teeth" behind the upper incisors — a key trait distinguishing rabbits from rodents[2].
All teeth are elodont (open-rooted): like rodent incisors, they must be worn down at the same rate they grow.
Only hay grinds teeth — pellets cannot
Chewing hay produces the side-to-side grinding motion that wears molars down. This motion requires long, coarse fiber to generate friction.
Pellets and soft vegetables are crushed vertically and swallowed — no lateral grinding, no wear[3].
A pellet can match hay's vitamins and calories. It can never replace hay's two physical functions: wearing teeth and stimulating gut motility. A pellet-heavy diet leads directly to overgrown molars, sharp spurs, pain, food refusal, and GI stasis.
The dental disease spiral
Not enough long fiber
→ molars under-worn → overgrowth
→ sharp spurs (points) pierce cheek/tongue
→ painful ulcers
→ avoids chewing hay, selects soft food only
→ even less grinding + gut motility slows
→ 🚨 GI STASISCommon dental diseases
- Malocclusion — teeth do not meet properly; acquired (diet-based, most common) or congenital (common in dwarf breeds)
- Tooth-root abscess — jaw swelling with thick, caseous pus; extremely hard to treat, requires surgery + long antibiotics. Any jaw/facial swelling → vet immediately[2]
- Nasolacrimal duct blockage — upper molar roots press the tear duct: recurring weepy eyes are usually dental in origin. Eye drops treat the symptom, not the cause.
High-risk breeds
Compact-faced (brachycephalic) breeds are most affected: Netherland Dwarf, Holland Lop, Lionhead, Dutch, Dwarf Hotot. They need more frequent dental checks[3].
Home check (weekly)
- Flip the upper lip: 4 upper incisors should be even, aligned, white-to-ivory
- Feel along the jaw and cheeks: no lumps or bumps (abscess?)
- Watch eating: no food dropping (quidding), no selective refusal of hay
- No drooling (wet/stained chin), no loud tooth grinding (pain signal — distinct from soft contented purring)
Molars — where most disease lives — cannot be checked at home. Annual vet exams still required (twice yearly for dwarf breeds).
- Any incisor abnormality (curved, overgrown, discolored)
- Jaw/facial swelling or palpable lump
- Drooling + refusing food
- Food dropping from the mouth
- Recurring weepy eyes
- Stops eating hay but still eats pellets (early molar-spike sign — not pickiness)
Prevention = hay
| Do | Why |
|---|---|
| Unlimited long-stem hay (1st/2nd cut, stemmy) | The only irreplaceable grinding mechanism |
| Limit pellets | A full rabbit skips hay |
| Annual vet dental checks | Catches acquired disease early |
| ❌ Chew sticks/stones as substitutes | Vertical biting, no lateral grinding — enrichment at best |
Bottom line: unlimited long-stem hay simultaneously protects the gut and the teeth. There is no alternative and no exception.
The full version of this topic, including the breed table and training notes, is in Chinese: 牙齿健康.
📚 引用与来源
本页所有结论的可溯源来源如下。来源按可信度分级： 🟢 兽医权威🟡 专业组织🟠 饲主经验。 如发现来源失效或结论存疑，欢迎提 Issue 纠错。