Fleas, Mites + Other Parasites in Rabbits: What to Know

This article is based on Dr. Sydney Pokard's Vet Set talk at Bun Chia Burrow, July 26, 2026. Dr. Pokard is the founder and practice owner of Fauna Veterinary Collective in Lake Forest, South Orange County.

Want to watch the talk? Link coming soon!

Parasites are not a topic most rabbit parents think about until they have a problem. But fleas, mites, and internal parasites are more common in domestic rabbits, including indoor-only rabbits, than most people realize. Dr. Sydney Pokard, founder of Fauna Veterinary Collective, covered the full landscape at BCB's July 2026 Vet Set: what to look for, what transmits disease, what to treat with, and what to absolutely avoid.

This article summarizes what she covered.

External Parasites

Fleas
In the United States, the primary fleas infecting rabbits are the dog flea and the cat flea - not a rabbit-specific species. Rabbit-specific fleas are seen more commonly in the UK. But the dog and cat flea readily infects rabbits, and the diseases they transmit are a serious concern regardless of species.

What they look like: Fleas are 1-3 millimeters — about the size of a black pepper speck. They are difficult to see, especially in a rabbit's dense coat. What you are more likely to notice is flea dirt — flea feces that looks like dark specks in the fur. To confirm: place the specks on a damp paper towel. If they turn reddish, that is flea dirt. The redness comes from digested blood.

Signs of flea infestation in rabbits:

• Vigorous scratching, particularly around the hindquarters, behind the neck, the belly, and the groin area

• Behavioral changes: irritability, aggression, or lethargy

• Visible flea dirt in the coat

• Actual fleas moving through the fur (fast-moving dark specks)

Why indoor rabbits are not safe: Dr. Pokard was clear on this - she sees fleas in indoor-only rabbits regularly. Fleas can be tracked in on shoes, on other pets, or through ground-level openings. Living in a higher-floor apartment reduces risk but does not eliminate it. If you are meticulous about shoes and have no other animals, exposure risk is low, but not zero.

Why fleas matter beyond the itch: Fleas are not just uncomfortable. They transmit serious diseases:

• Myxomatosis: a viral disease that is frequently fatal. More common in the Pacific Northwest and the UK, but present on the West Coast. There is no U.S. vaccine available.

• RHDV-2 (Rabbit Hemorrhagic Disease Virus 2): can be transmitted by fleas and mosquitoes, not just direct contact. This is one more reason RHDV-2 vaccination matters even for indoor rabbits.

• Tularemia: a bacterial infection transmissible by fleas, potentially fatal.

• Tapeworms: fleas that are inadvertently ingested can develop into tapeworms.

• Anemia: a heavy flea burden causes blood loss. Dr. Pokard noted that severe flea infestations can cause significant anemia in rabbits.

• Secondary bacterial skin infections: chronic flea bites and scratching break down the skin barrier, creating entry points for infection.

Mites
There are several types of mites that affect rabbits. Diagnosis typically involves a skin scraping evaluated under a microscope at the clinic, or in some cases a simple tape prep.

Walking dandruff (Cheyletiella)
Dr. Pokard's favorite mite - and one of the most common in rabbits. Cheyletiella causes distinctive dandruff-like flakes, usually along the back. The mite is actually visible moving through the flakes under magnification (hence "walking dandruff").

• Parents often notice: "My rabbit has flakes on their back." The differential is dry skin, another infection, or Cheyletiella. Dr. Pokard said she always tests for it when she sees this presentation because it is so common and so itchy.

• Diagnosis is easy: a clear tape pressed against the flakes, examined under a microscope. No skin scraping required.

Important: Cheyletiella is zoonotic - it can transfer to humans. It does not want to live on people, but it will bite if given the opportunity. You may notice small red spots or bites on your own skin if your rabbit has Cheyletiella. Treatment of the rabbit resolves the human exposure.

Ear mites (Psoroptes cuniculi)
Ear mites cause severe crusting inside the ear canal - the kind of buildup that, in advanced cases, can fill the entire canal and extend onto the outer ear. Dr. Pokard showed a clinical case of a stray rabbit with extensive ear mite crusting and was explicit: do not attempt to remove the crusts at home. The pain involved is severe enough that rabbits can die from the shock of attempted crust removal. The protocol is stabilize first, sedate, then carefully remove — and even then, Dr. Pokard often treats first and removes later.

Ear mites are more commonly seen in stray or outdoor rabbits, recently adopted shelter rabbits, or rabbits with exposure to new animals. Well-established indoor pet rabbits have lower risk unless a new animal is introduced.

A question from the audience surfaced an important point: ear mites can, in severe cases, cause enough damage that surgical intervention on the ear becomes necessary. Early treatment prevents this outcome entirely.

Hay mites
A question from the audience - are there mites in hay? Yes, potentially. Mites that live in the environment can be present in hay, particularly from unregulated sources. If a wild animal (rabbit, mouse, rodent) infected with mites has access to hay before it is cut and packaged, those mites can transfer. Dr. Pokard noted a hesitation about unregulated feed store hay for this reason - not that it is always problematic, but it is worth asking the feed store about their vector control practices. If they cannot answer, that is relevant information.

Environmental hay mites are visible (small red mites) and do not strongly prefer rabbits as hosts, but they will bite and feed opportunistically. They are treated the same way as other mites.

Internal Parasites

Coccidiosis (Eimeria spp.)
The most significant internal parasite concern in rabbits, particularly in young animals. Dr. Pokard recommended that every baby rabbit be treated prophylactically - coccidiosis can kill young rabbits before they reach adulthood if untreated. Adult rabbits can sometimes manage exposure with their immune system but should still be treated if infection is confirmed.

Coccidiosis also has a hepatic (liver) form - the parasite migrates to the liver and causes hepatic coccidiosis, which is highly fatal.

• Clinical signs: Diarrhea or abnormally soft stools, lethargy, reduced appetite. These signs overlap significantly with other conditions, which is why testing is essential.

• Diagnosis: Fecal flotation - the feces is placed in a solution that causes parasite eggs to rise to the surface, where they are identified under a microscope.

• Treatment: Ponazuril (preferred) or Albon (sulfadimethoxine, a sulfa antibiotic). Both are effective; ponazuril is generally the first choice.

• Dr. Pokard's recommendation: Annual fecal testing for all rabbits. More frequently if your rabbit has outdoor exposure, boards regularly, or has been introduced to new animals. She confirmed that requesting an annual fecal test at a rabbit-savvy exotic vet practice is completely standard - not an unusual ask. If a vet seems surprised by the request, that may indicate limited exotic animal experience.

Tapeworms
Tapeworms in rabbits most commonly come from inadvertently ingesting an infected flea - another reason flea control matters. They are identified via fecal testing and treated with appropriate antiparasitic medication. Less common than coccidiosis but worth testing for.

How Internal Parasites Spread

The concern is primarily microscopic eggs shed in feces. When a rabbit's litter box is cleaned, especially when disrupting dry feces, those particles become airborne. Dr. Pokard's practical advice: wear a mask when cleaning the litter box, particularly if your rabbit has a known parasite infection or is being treated. Other animals in the household can be exposed the same way. Good hygiene, regular litter changes, thorough cleaning of enclosure surfaces, is the primary prevention tool.

• BCB's cleaning protocol: This came up directly in the Q+A. BCB's protocol of vinegar and water pre-clean, hot soap and water wash, and Rescue disinfectant spray is exactly what Dr. Pokard recommends. The Rescue disinfectant specifically addresses a broad spectrum of pathogens including viral and parasitic concerns.

Treatment

Never use: Fipronil (Frontline)
Dr. Pokard was emphatic about this. Fipronil, the active ingredient in Frontline and many similar products, is toxic to rabbits. It causes severe neurological signs and death. It is commonly used on cats and dogs, which is exactly the danger: a well-meaning parent with other pets may assume what works for the cat is safe for the rabbit. It is not. Check every product's active ingredients before it touches your rabbit.

The recommended treatment: Selamectin (Revolution)
Selamectin is Dr. Pokard's preferred treatment and preventative for external parasites in rabbits. It is a topical medication applied to the back of the neck, marketed under several brand names. The active ingredient to look for is selamectin alone. Products with selamectin plus additional ingredients (Revolution Plus, for example) have been less studied in rabbits and are not her first choice.

What selamectin covers: fleas, lice, ticks, mites, and mosquito repellent. It addresses all life cycle stages, including eggs and larvae on the body. It does not kill fleas in the environment, which is why environmental sanitation (vacuuming, cleaning the enclosure) is still necessary alongside treatment.

There is no commercially produced rabbit-specific parasite preventative. Everything used in rabbits is extrapolated from dog and cat products. This makes it critical to work with a rabbit-savvy exotic vet who knows which drugs have been studied in rabbits and at what doses. Dosing is calculated by body weight - your vet will calculate the exact amount and show you how to apply it.

Dosing schedule:

• Prevention: once every 30 days

• Active infestation: Dr. Pokard may treat every 2-3 weeks in severe cases to prevent the drop in effectiveness that occurs near the end of the dosing window

Selamectin in sick or compromised rabbits: An audience member asked whether selamectin is safe for a rabbit with EC-related head tilt. Dr. Pokard confirmed: selamectin is not contraindicated in sick rabbits. Unlike a vaccine, it does not challenge the immune system. The only reason to avoid it would be a prior adverse reaction to the product. When in doubt, discuss with your vet.

New and Emerging Concerns

RHDV-2 and Vector Transmission
As discussed above, RHDV-2 can be transmitted by fleas and mosquitoes, not just through direct rabbit-to-rabbit contact or environmental contamination. This adds another layer of importance to both flea prevention and vaccination. An unvaccinated rabbit with flea exposure is at risk through multiple transmission routes simultaneously.

New World Screwworm
Dr. Pokard briefly addressed the New World Screwworm - a parasitic fly whose larvae burrow into living tissue, causing severe and rapidly progressing wound myiasis. It is a reportable disease in California, meaning any confirmed case must be reported to the California Department of Agriculture and the public health department. It is not something Dr. Pokard sees regularly in her practice, but it is an emerging concern as its geographic range expands. Any wound that appears to worsen rapidly, produces unusual discharge, or shows signs of tissue destruction should be evaluated immediately by a veterinarian.

Environmental and Household Pest Control

A question from the audience: what about exterior pest control around the home?

Dr. Pokard's approach:

• Humane traps (Have-a-Heart style) for rodents and larger vectors: catch and relocate rather than kill traps

• Fly strips and similar non-toxic insect control for flying insects

• Spray pesticides: use with caution. Products marketed as safe around pets are not always reliably effective, and natural alternatives may help but not fully eliminate a problem. The priority is preventing rabbit exposure: if a product is used in a space your rabbit will not access, the risk is much lower. If there is any potential for rabbit contact with treated surfaces, choose the safest available option.

• Diatomaceous earth (food grade): an audience member asked about this for perimeter control. Dr. Pokard said it is a reasonable option and could be considered, particularly for perimeter application in areas rabbits do not directly access.

• Year-round vigilance: Southern California does not have a true flea off-season. Dr. Pokard noted she sees fleas year-round, with surges in summer and again in cooler winter months when fleas are active in the newly moderate temperatures.

When to Call Your Vet

• Any rabbit showing vigorous scratching, especially in concentrated areas

• Visible flea dirt or movement in the coat

• Flaking or crusting along the back that does not resolve

• Any ear discharge, head shaking, or visible ear crusting

• Any wound that appears to worsen unexpectedly

• Diarrhea, soft stools, or lethargy in a young rabbit — rule out coccidiosis

• Any new rabbit entering the household — fecal test before or immediately after introduction

See our LA + OC Exotic Vet Directory → for rabbit-savvy exotic vets in Southern California.

Source:
Dr. Sydney Pokard, DVM — Vet Set Talk, Bun Chia Burrow, July 26, 2026. Founder + Practice Owner, Fauna Veterinary Collective, Foothill Ranch, CA.