Rabbit Dental Disease: Why Hay Keeps Teeth Healthy

Unlike human teeth, a rabbit's incisors and cheek teeth (molars) grow continuously throughout their life. In the wild, this is matched by a diet of tough, fibrous grasses that require hours of grinding, circular chewing each day, which wears the teeth down at roughly the same rate they grow. When this natural balance is disrupted, dental disease is the almost inevitable result.

This means dental disease in pet rabbits is overwhelmingly a diet-and-husbandry problem rather than simple bad luck. A rabbit fed insufficient hay, too many pellets, or a muesli-style mix is at significantly higher risk of developing painful tooth overgrowth than one fed a hay-based diet throughout life.

Low-fibre diets encourage a different, less effective up-and-down chewing motion rather than the side-to-side grinding that hay promotes, which fails to wear teeth down evenly. Over time, this leads to overgrown incisors that prevent the mouth closing properly, or overgrown cheek teeth that develop sharp points called spurs, which dig painfully into the cheeks and tongue.

Some rabbits, particularly dwarf and flat-faced breeds, also have a genetic or structural predisposition toward misaligned teeth (malocclusion) regardless of diet, making consistent monitoring especially important for these individuals even with excellent feeding habits.

Because rabbits are prey animals that instinctively hide pain, dental disease often progresses significantly before owners notice anything wrong. Signs to watch for include a reduced appetite or avoiding harder foods, weight loss, drooling or wet fur around the chin, reduced or smaller droppings, a dirty or soiled bottom from reduced grooming, watery eyes, and a reluctance to be handled around the face.

A rabbit that is still eating something, such as soft treats, can still have significant molar problems, since softer foods require less effective chewing. Don't rely on appetite alone as reassurance that the teeth are fine.

On a non-slip surface, gently lift your rabbit's lips to check the front incisors, which should be white, smooth, straight, and properly aligned with the upper teeth slightly overlapping the lower ones. You cannot see the back molars directly, but gently feeling along the outside of the cheeks and lower jaw for lumps, heat or signs of discomfort can pick up on some problems.

Make these checks part of a regular routine, roughly weekly, alongside a few veterinary dental checks each year, since early detection makes treatment considerably easier and less invasive. Never force a rabbit that is struggling or panicking during a check; stop and try again later, or let your vet handle it.

The single most protective step is feeding a hay-based diet (ideally unlimited good-quality hay or grass, making up the large majority of intake) alongside fresh leafy greens and a small measured portion of pellets rather than muesli. This supports the natural grinding chewing action that keeps teeth at a healthy length.

Combine this with regular at-home checks and routine veterinary dental examinations, since even well-fed rabbits can develop dental problems due to genetics or injury. If dental disease is diagnosed, treatment (which may include filing or removing problem teeth under anaesthetic) is usually most successful and least invasive when started early, so don't delay a veterinary visit if you notice any warning signs.