Rex Rabbit Health: Common Issues and How to Keep Your Rabbit Thriving

Rex rabbits are generally healthy, robust rabbits with a lifespan of 7 to 10 years when well cared for. But being a larger breed means they face some specific health challenges that differ from small and dwarf breeds. Knowing what to watch for—and acting early—makes all the difference between a minor issue and a serious emergency.

Dental Disease: The Silent Threat

All rabbits are prone to dental problems, but Rex rabbits seem particularly susceptible, in my experience. Rabbit teeth grow continuously throughout their lives—about 1 to 3 millimeters per month—and if the bite isn't aligned properly, the teeth can overgrow, spike into the cheeks or tongue, or develop sharp edges that cut the mouth.

Watch for these early warning signs of dental disease:

• Dropping food or reluctance to eat hard foods
• Weight loss despite a normal appetite
• Wet chin or drooling (sometimes looks like foam around the mouth)
• Skipping pellets while still eating hay
• Eye discharge or weepy eyes (often a sign of tooth root elongation)
• Visible swelling on the jaw or face

Prevention starts with hay. The grinding motion of eating long-stranded grass hay naturally wears teeth down evenly. Offer unlimited Timothy hay and other grass hays. Avoid sugary treats that might spoil their appetite for hay. Also provide wooden chew toys to encourage chewing and jaw movement.

Have your vet check teeth during annual exams, even if your Rex seems fine. Catching a misalignment early is far easier than treating a serious molar spike that has caused mouth ulcers.

Gastrointestinal Stasis: When the Gut Stops

Gastrointestinal stasis is one of the most common—and dangerous—health issues for any rabbit, Rex included. It occurs when the digestive system slows or stops entirely, causing gas buildup, pain, and potentially fatal complications if untreated.

Stasis can be triggered by stress, dehydration, pain from another source, a too-grain-heavy diet, or simply not eating enough fiber. Watch for:

• No fecal pellets or very small, dry pellets
• Hunching, unwillingness to move
• Grinding teeth (pain signal)
• Loss of appetite
• A hard, bloated belly

If you suspect stasis, contact your vet immediately. This is a medical emergency. Treatment often includes pain medication, gut motility drugs, fluids, and syringe feeding while the gut recovers. At home, you can help by keeping your Rex warm, offering fresh pineapple juice (which may help break down hairballs), and massaging the belly gently.

Prevent stasis by feeding a hay-heavy diet, ensuring fresh water is always available, and providing daily exercise to keep the gut moving.

Pododermatitis: Sore Hocks

Rex rabbits are susceptible to sore hocks—pressure sores on the bottoms of their feet. This is especially true for Rex rabbits kept on wire flooring, improper surfaces, or those who are overweight. The breed's body weight combined with less fur padding on the feet than some other breeds makes them vulnerable.

Signs of pododermatitis include:

• Redness or bald patches on the bottom of the feet
• Limping or reluctance to put weight on a foot
• Cuts, scabs, or open sores on the hock area
• Hesitation to hop or move normally

Treatment involves cleaning the wound, applying rabbit-safe topical antibiotics, and padding the enclosure with soft fleece or cotton bedding. For serious cases, your vet may prescribe additional medication. Prevention is straightforward: provide solid flooring or deep soft bedding, keep weight in a healthy range, and check feet regularly.

Head Tilt: More Common Than You'd Think

Head tilt (formally called vestibular disease) can occur in Rex rabbits, often caused by inner ear infections or Encephalitozoon cuniculi (E. cuniculi), a microscopic parasite that affects the nervous system. Rabbits with head tilt may tilt their head dramatically to one side, circle, lose their balance, or have rapid eye movements (nystagmus).

Head tilt is treatable in many cases, especially if caught early. Treatment depends on the cause—anti-parasitic drugs for E. cuniculi, antibiotics for bacterial ear infections, and supportive care like hand-feeding and fluid administration. Even rabbits with severe head tilt can recover with dedicated nursing care, though some are left with a permanent head tilt. They're still happy rabbits—they just look a bit dramatic.

Respiratory Infections

Rex rabbits can be prone to respiratory infections, particularly if kept in damp, poorly ventilated conditions. Snuffles (pasteurella) is one of the more common bacterial infections, causing sneezing, nasal discharge, and matted fur around the nose. While some rabbits carry the bacteria without symptoms, stress can trigger an active infection.

Keep your Rex's living area dry, draft-free but well-ventilated, and clean. Avoid dusty bedding—paper-based or fleece substrates are gentler on the respiratory system. If your Rex shows signs of respiratory illness, see your vet. Left untreated, snuffles can develop into pneumonia.

Heat Sensitivity

Rex rabbits have dense coats and are more sensitive to heat than some lighter-furred breeds. Temperatures above 80°F can be dangerous, and anything above 85°F puts them at real risk of heat stroke. Signs include panting, flattening out on cool surfaces, drooling, and lethargy.

In hot weather, move your Rex to a cool area, provide frozen water bottles to lie against, offer fresh cool water, and ensure good airflow. Never leave a Rex in a hot car, sunny room, or unventilated space.

Reproductive Cancers: The Spay Argument

This is non-negotiable in my book. Unspayed female Rex rabbits have an extremely high risk of uterine cancer—studies suggest up to 80% of unspayed does develop uterine cancer by age 5 or 6. This is one of the leading causes of death in middle-aged female rabbits. The solution is simple: spay your Rex between 4 and 6 months of age.

Neutering male Rex rabbits also carries benefits—reduced aggression, marking behavior, and mounting. It also eliminates the risk of testicular cancer. Even if you have two rabbits of the same sex, spaying and neutering makes for calmer, healthier, easier-to-bond rabbits.

Regular Health Checks: What to Watch At Home

Develop a weekly health check routine with your Rex. Look over the entire body—eyes clear and bright, ears clean inside, nose dry and clean, teeth not overgrown or chipped. Run your hands over the body feeling for any lumps, bumps, or areas of sensitivity. Check the feet for any redness, swelling, or nail overgrowth. Look at the fecal pellets—they should be round, firm, and consistent in size. Any changes in droppings are worth noting and monitoring.

Any of the following signs warrant an immediate vet call:

• Loss of appetite for more than 12 hours
• No fecal pellets for more than 24 hours
• Diarrhea or very soft droppings
• Bloating or hard belly
• Lethargy or hunching
• Discharge from eyes or nose
• Unequal pupils or head tilt

When in doubt, call your rabbit-savvy vet. Rabbits can go downhill fast, and what looks like a minor issue this morning can become critical by evening. An ounce of prevention and early intervention extends not just quality of life but length of it.

Emergency Signs to Watch For

Every Rex owner should know the signs that require immediate veterinary attention. Rabbits can deteriorate rapidly, and waiting even a few hours can make the difference between a manageable problem and a life-threatening one.

Contact your veterinarian immediately if you observe:

• No eating or drinking for more than 6 hours
• No droppings or a sudden change in fecal output
• Lethargy — unresponsive or barely moving
• Labored breathing, wheezing, or gasping
• Severe bloating or a hard, distended stomach
• Collapse or loss of coordination
• Convulsions or seizures
• Bleeding from any orifice, including nail quicks
• Flystrike — flies laying eggs in soiled fur

Reproductive Health

Spaying or neutering is one of the most important health decisions you will make for your Rex. Intact rabbits are at significantly higher risk for reproductive cancers — uterine adenocarcinoma is extremely common in unspayed female rabbits and can be fatal. Males are not exempt from reproductive cancers either.

Beyond cancer prevention, spaying and neutering reduces territorial spraying, aggression, and problematic mounting behavior. It also makes rabbits easier to bond with each other and with their owners. The ideal age for the procedure is between four and six months, though your veterinarian can advise on the best timing for your individual rabbit.

Parasites and External Pests

Rexs can suffer from a variety of external parasites, most commonly ear mites, fur mites, and fleas. Signs of infestation include excessive scratching, head shaking, hair loss in patches, and visible debris in the ears or on the skin.

Ear mites are particularly common and present with dark, crumbly debris inside the ear canal — often described as looking like coffee grounds. They are treatable with medication prescribed by your veterinarian. Fur mites may cause flaky, itchy skin and coat deterioration.

Fleas can be treated with rabbit-safe topical medications. Avoid over-the-counter flea products unless specifically labeled safe for rabbits — many dog and cat flea treatments are toxic to rabbits. Fly strike is a summer risk for any rabbit with a dirty coat or open wound — keep your rabbit's living area clean and check their coat daily during hot weather.

Senior Rex Health

As Rexs age, their health needs evolve. Most rabbits are considered senior at around five to six years, though this varies by individual and breed. Watch for signs of arthritis (reluctance to hop, difficulty accessing litter box, changes in grooming habits), vision or hearing loss, and reduced appetite.

Senior rabbits benefit from more frequent veterinary checkups — twice a year is ideal. Adjust their environment to make daily life easier: lower entry points to enclosures, softer bedding, ramps instead of steps, and food and water positioned at comfortable heights. Their diet may need adjustment to account for reduced activity levels and changing nutritional needs.