Rabbit dental disease: the early signs owners miss

Quick answer

By the time a rabbit is drooling or refusing food, dental disease has usually been developing for months. The signs that come first are quiet ones, and almost all of them are things owners see and explain away: the hay is not going down as fast, the rabbit picks the pellets out first, the fur under the chin is slightly damp, there are sticky droppings stuck to the rear end, one eye waters.

The reason those signs matter is that rabbit teeth never stop growing. Wear has to match growth, and wear comes from the long sideways grinding motion that only coarse forage demands. A rabbit that eats less hay wears its teeth less, which makes the teeth worse, which makes eating hay harder. That loop is why early detection changes the outcome so much.

A weekly handling session is where dental disease is caught. You are checking the chin, the jaw line, the eyes, the coat, the rear end and the weight, not looking in the mouth.

• You cannot see the cheek teeth at home. Do not conclude the mouth is fine because the front teeth look normal.
• Hay intake falling is the earliest measurable sign. Weigh the hay if you have to.
• A damp chin, a matted coat or droppings stuck to the rear are dental signs in a rabbit.
• Never clip a rabbit's overgrown front teeth with clippers. It splits the tooth and causes abscesses.
• Weight loss in a rabbit is hidden by fur. A weekly weight is the only honest measure.

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Never trim a rabbit's incisors with nail clippers or side cutters.

Rabbit incisors are long, curved and hollow, with living pulp inside. Clipping them shatters the tooth lengthwise, exposes the pulp, and drives infection into the tooth socket and the surrounding bone. The result is a painful abscess in one of the hardest places in veterinary medicine to treat, because rabbit pus is thick and does not drain. Overgrown incisors are shortened with a dental burr under sedation or anaesthesia, or the teeth are extracted. If someone offers to clip your rabbit's teeth with clippers, decline.
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Decide in 60 seconds

Why rabbit teeth go wrong

A rabbit's teeth grow throughout its life. That is normal and it works, provided the wear matches the growth.

The wear comes from chewing. Rabbits chew grass and hay with a wide sideways movement of the lower jaw, dragging the cheek teeth across each other and grinding the flat surfaces down evenly. That action requires long, tough, abrasive fibre. Chewing a pellet or a piece of vegetable uses a much smaller vertical crushing motion, and it wears the teeth far less.

So a rabbit eating mostly pellets, or picking the palatable pieces out of a muesli-style mix, does far less grinding than one eating hay all day. The crowns elongate. Because the upper and lower rows meet at a slight angle, the elongation is not even, and sharp points form: on the tongue side of the lower cheek teeth and the cheek side of the upper ones.

Those spurs cut. A rabbit with an ulcerated tongue or cheek stops chewing on that side, then stops eating hay because hay is hard work, then does even less grinding. The disease accelerates itself.

The second half of the problem is invisible from inside the mouth. Teeth that cannot wear down at the top grow at the bottom too, and the roots elongate into the bone. Upper roots push towards the tear duct that runs from the eye down to the nose, blocking it and producing a watery eye, and further back they push towards the eye socket. Lower roots produce palpable irregular bumps along the underside of the jaw.

That root component is why a vet will often want skull imaging rather than just a look in the mouth. What the roots are doing determines whether the case can be managed with occasional burring or is heading towards extractions and abscesses.

There is a third contributor that is easy to overlook. Rabbits absorb calcium from the gut in proportion to what they eat rather than to what they need, and the bone that anchors the teeth depends on adequate calcium and vitamin D. A diet low in calcium, or a rabbit kept permanently indoors with no exposure to natural light, may have weaker supporting bone. This is one reason grass and good hay outperform a restricted pellet diet.

What healthy looks like

A healthy rabbit eats hay more or less continuously. The pile visibly disappears, and hay should be the great majority of what it consumes.

The chin, dewlap and front legs are dry. Rabbits do not drool.

The front teeth meet neatly, the uppers slightly overlapping the lowers, with no gap and no visible curling or sideways deviation.

The jaw line underneath feels smooth and symmetrical.

Both eyes are clear and dry, with no staining down the face.

The coat is smooth and evenly groomed, including the areas the rabbit reaches with its mouth.

The rear end is clean. Firm round droppings appear in quantity, and soft caecotrophs are eaten directly and rarely seen.

The weight is stable week to week.

Grooming is also examining. Running a comb through the coat is when you find the mats, the scurf and the damp patches that point back at the mouth.

The early signs, in the order they usually appear

Hay intake falls.

This is the first and most useful sign, and it is the one most owners miss because hay is offered rather than measured. Fill the rack with a known amount and note how long it lasts. A rabbit that used to empty it in two days and now takes four has changed.

Selective eating.

The rabbit goes for the pellets, the greens and the soft items and leaves the coarse hay. The owner interprets this as fussiness. It is a rabbit avoiding the food that hurts.

Chewing changes.

Chewing on one side, dropping partly chewed food, taking a long time over a piece of vegetable, or approaching food and then turning away.

A damp chin.

Drooling in a rabbit is always abnormal. Early on it is subtle: slightly damp fur under the chin, on the dewlap or on the inside of the forelegs where the rabbit has wiped its face. Later the fur becomes stained and matted and the skin underneath becomes sore.

Caecotrophs on the rear end.

Rabbits produce soft nutrient-rich droppings at night and eat them straight from the anus. A rabbit with a painful mouth, a sore tongue, or pain when it curls to reach, stops doing it. The result is sticky clumps on the rear and around the tail. Owners commonly interpret this as diarrhoea, which it is not, and as a diet problem, which it may be, but a rabbit that has suddenly started leaving caecotrophs deserves a dental examination.

Grooming deteriorates.

Rabbits groom with their teeth. A rabbit that cannot groom develops a scurfy coat, mats behind the shoulders and at the rear, and a build-up of shed fur. In a long-coated rabbit this happens faster and looks more dramatic.

A watery eye.

Usually one side. The tear duct passes very close to the root of an upper tooth, and root elongation narrows or blocks it. Tears then run down the face instead of draining into the nose, leaving a wet track and staining. It is frequently treated as an eye problem for months.

Bumps along the jaw.

Run a finger along the underside of the lower jaw from the chin backwards. It should be smooth. Firm irregular swellings mean root elongation or, if soft, warm or growing, an abscess.

Weight loss.

Slow and completely hidden by fur. Weekly weighing on a kitchen scale is the only way to see it. By the time a rabbit looks thin, a great deal of muscle has gone.

Behaviour change.

Less interactive, sitting still for longer, reluctance to be touched around the head, and eventually a hunched posture and loud teeth grinding, which in rabbits signals pain rather than contentment. Note that the quiet grinding of a relaxed rabbit is a different, softer sound; the pain version is loud and continuous.

What you can and cannot examine at home

You can see the incisors.

Gently lift the upper lip and lower lip in turn. You are looking for length, direction, symmetry, chips, and whether the uppers meet the lowers correctly. Look behind the upper incisors for the small peg teeth.

You cannot see the cheek teeth.

A rabbit's mouth opens only a little, the tongue is large, and the cheek teeth sit behind a long diastema. Even with an otoscope in a conscious rabbit, a vet sees only part of the arcade and can miss significant disease. A full assessment usually needs sedation or anaesthesia and often skull imaging.

This asymmetry matters because it is the source of the commonest false reassurance in rabbit medicine. Front teeth that look perfect tell you almost nothing about the back of the mouth, and cheek teeth are where acquired dental disease usually starts.

You can feel the jaw.

Run fingertips along both sides of the lower jaw and compare. Asymmetry is meaningful.

You can look at the eyes and the face.

Compare the two sides for wetness, staining, swelling and whether one eye looks more prominent than the other.

You can weigh.

Every week, same scale, same time of day, written down.

A coat that has become scurfy or matted where the rabbit should be able to reach is a grooming failure, and grooming failure in a rabbit usually starts in the mouth.

Which rabbits are at higher risk

Dwarf and lop breeds. Selective breeding for a short, rounded skull compresses the space the teeth occupy, and congenital incisor malocclusion is common in dwarf breeds. Lop-eared rabbits also have a higher rate of ear disease, and dental and ear problems often occur together.

Rabbits on pellet or muesli diets. Muesli mixes allow selective feeding, so the rabbit eats the cereal and molasses pieces and leaves the fibre, which is both a nutritional and a dental problem.

Older rabbits. Acquired dental disease accumulates with time.

Rabbits with a history of trauma. A rabbit that pulls on cage bars or has fallen can damage the growth tissue at the base of an incisor, after which that tooth grows abnormally for life.

House rabbits with no outdoor access or natural light. The calcium and vitamin D contribution is smaller than the fibre contribution, but it is real.

Rabbits already diagnosed. Dental disease in rabbits is managed rather than cured. A rabbit that has needed one dental will very likely need more, on a schedule that becomes predictable over time.

Prevention that actually works

Hay and grass should be the overwhelming majority of what a rabbit eats, available at all times, in a quantity roughly the size of the rabbit itself each day.

Offer several types of grass hay and change them around, because a rabbit that finds hay interesting eats more of it. Put hay in places that make eating it an activity: in a rack, stuffed into a cardboard tube, scattered in a litter tray at one end.

Pellets are a supplement, not a meal. Feed a measured amount by weight, of an extruded single-component pellet rather than a muesli mix, so the rabbit cannot select.

Fresh greens daily add variety and moisture.

Growing grass, safely accessible, is better than anything else if you can provide it.

Wood chews and mineral blocks are not a dental treatment. They do not produce the sideways grinding motion that wears cheek teeth, and a rabbit that is chewing wood instead of hay is not fixing anything.

Weigh weekly. Check the chin, jaw, eyes, coat and rear end weekly. Book a dental check as part of the annual health examination, and more often for a rabbit with any history.

What never to do

Do not clip incisors with clippers or cutters.

Do not attempt to file or trim any tooth at home.

Do not assume normal front teeth mean a normal mouth.

Do not feed muesli-style mixes.

Do not treat a watery eye as an eye problem indefinitely without a dental assessment.

Do not treat sticky droppings on the rear as diarrhoea and change the diet without investigating the mouth.

Do not delay when a rabbit stops eating. Gut stasis begins within hours and is its own emergency.

Do not give painkillers intended for people or for other animals.

Do not put off a recommended dental procedure because of anaesthetic worry. Rabbit anaesthesia in an experienced practice is far safer than untreated dental pain, and a rabbit in pain stops eating, which is the greater risk.

Do not accept clipping as a long-term plan from any provider.

When to get help

Go the same day for a rabbit that has stopped eating, is producing no droppings, is sitting hunched, or is grinding its teeth loudly, and for a soiled rear end in fly season.

Book within days for falling hay intake, selective eating, a damp chin, dropping food, caecotrophs stuck to the rear, a watery eye, a jaw bump, matting the rabbit has stopped grooming out, or weight loss across consecutive weekly checks.

Book a routine dental assessment annually for every rabbit, and at the interval your vet advises for any rabbit already diagnosed.

The goal is a rabbit that grooms itself, keeps its own rear end clean, and works through a large pile of hay every day.

Bring the weight record, an estimate of daily hay intake and how it has changed, the exact diet including pellet brand and amount, photographs of the face and jaw over time, a photograph of the droppings, and the dates of any previous dental work. Expect a rabbit-experienced vet to want a proper oral examination under sedation and skull imaging, because the tooth roots determine the plan and they cannot be assessed any other way.