Overgrown Teeth in Rex Rabbits

Every tooth in a rabbit's mouth, not only the visible front incisors, grows for the animal's entire life, and a Rex's dental biology sits squarely within that species-wide pattern — the recessive gene responsible for this breed's plush, upright coat acts on hair follicles, not on jaw structure or tooth growth, so there's no documented breed-specific dental risk or protection here the way there is with, say, hock condition.

Hay does the mechanical work that keeps molars in check: the side-to-side grinding motion involved in pulling apart and chewing long fibrous strands wears teeth down at roughly the same rate they grow, and pellets, however large the daily portion, simply don't ask the jaw to move that way — a diet skewed toward pellets is the single most common preventable cause of molar overgrowth across every rabbit breed, this one included.

Inherited malocclusion is a separate, diet-independent risk that shows up occasionally in any rabbit line, Rex included, and because there's no published evidence this breed carries an elevated or reduced rate of it compared to others, a keeper has no particular reason to expect more or less of it here than in a Netherland Dwarf or a Holland Lop.

A physical injury — a fall from a height, an impact against furniture or an enclosure fixture, or, rarely, a bite from a cage-mate — can also throw off normal wear by changing how the upper and lower teeth meet, and a heavier-bodied breed like the Rex could plausibly land with somewhat more force in a fall than a small dwarf rabbit, though this is a matter of degree rather than a distinct risk category.

Molar problems are effectively invisible from a casual look at the front teeth in any rabbit, and a Rex losing weight, drooling, or dropping food without obvious incisor overgrowth still needs the same full oral exam any other breed would get under the same symptoms — there's no shortcut available here based on coat type.

Where a vet does find a genuine size difference relevant is physical: this breed's somewhat larger jaw and skull, compared with a compact dwarf breed, can make positioning for an oral exam marginally more straightforward, though that's a convenience for the vet rather than anything that changes the underlying dental picture.

Home dental trims are a bad idea for any rabbit regardless of breed, since an improperly angled trim on a continuously growing tooth risks a crack that runs down into the root — a far worse outcome than the original overgrowth, and one that applies to a Rex exactly as it would to any other rabbit taken to a groomer or trimmed at home without proper training.

A rabbit recovering from a professional dental correction typically returns to normal hay-eating within a day or two once the acute discomfort resolves, and that timeline holds across breeds broadly — a returning appetite for hay specifically is a reasonably reliable sign the correction worked.

A keeper who's had one Rex diagnosed with inherited malocclusion has a reasonable basis to watch closely for the same issue in any related rabbits from the same line, since a hereditary tendency toward misaligned teeth has been documented across rabbit breeding lines generally, not tied to any one breed's coat trait.

Rabbit incisors and molars are technically described as 'aradicular hypsodont' teeth — meaning they have no true root and simply keep erupting for life at roughly the pace they're worn away — and understanding that a rabbit's mouth was built around continuous wear, not a fixed adult tooth set the way a human's is, makes clear why hay isn't optional dietary trivia but the mechanical input the whole system depends on.

A Rex that's dropping food from one side of the mouth, or that shows a visible head tilt while eating, is giving a more specific clue than general reduced appetite alone, and mentioning that detail to a vet can help narrow down whether the issue is a one-sided molar spur versus a broader alignment problem.

Keeping hay as the clear bulk of daily food, with pellets measured rather than free-fed, supports the continuous molar wear this species depends on.

A quick look at the front incisors during any routine handling session catches obvious overgrowth or a crooked bite early.

Periodic vet dental checks that include a proper molar assessment catch a developing spur long before it's visible from the front of the mouth.

A variety of safe chew items alongside hay gives some added dental engagement, though hay remains the primary driver of actual wear.

Noticing a subtly slower or more careful chewing style — rather than waiting for obvious weight loss — flags a problem while it's still easy to treat.

A quick review of the enclosure for hazards a bigger, more forceful rabbit could strike a tooth against closes off one avoidable injury route.