Rabbit Hemorrhagic Disease (RHDV2): Symptoms, Prevention, and Urgency
Rabbit Hemorrhagic Disease Virus 2 — RHDV2, also called Viral Hemorrhagic Disease or VHD — has been spreading across the United States since 2020, and in 2026 it remains an active threat in many states. This highly contagious, often fatal virus can kill a rabbit within hours of symptoms appearing. Every rabbit owner needs to know these signs.
What Is RHDV2?
RHDV2 is a calicivirus that causes severe hemorrhaging (internal bleeding) affecting the liver and other organs. It has a mortality rate of approximately 70-80% in unvaccinated domestic rabbits. The virus spreads with alarming ease:
- Direct contact with infected rabbits
- Contaminated surfaces — the virus survives on surfaces, hay, clothing, and equipment for weeks to months
- Insect vectors — flies and other insects can carry the virus between locations
- Humans as mechanical carriers — you can bring it into your home on shoes or clothing after contact with wild rabbits
Importantly, there are currently no wild rabbit hosts in your area needed for spread — the virus can be carried to your rabbit on your clothing from a park where an infected wild rabbit died.
Unlike myxomatosis, RHDV2 has been detected across a much wider geographic range in the US, including the Southwest, Midwest, and expanding east.
Symptoms of RHDV2 in Rabbits
RHDV2 is terrifying because it can kill so fast that owners sometimes find a rabbit dead with no prior symptoms. When symptoms do occur:
- Sudden death — often without warning signs; apparently healthy rabbit found dead
- High fever (above 104°F)
- Extreme lethargy — rabbit becomes profoundly weak and non-responsive
- Loss of appetite — stops eating and drinking entirely
- Bleeding from the nose, mouth, or rectum — indicates severe hemorrhaging
- Neurological signs — seizures, incoordination, muscle spasms
- Labored breathing in terminal stages
Rabbits may die within 24-72 hours of first showing symptoms, or even faster in acute cases.
If you notice a lethargic rabbit not moving or rabbit not eating or drinking combined with any of the above signs, contact an exotic vet emergency line immediately.
When to Worry
Any rabbit that suddenly stops eating, becomes profoundly lethargic, or is found in a collapsed state needs emergency veterinary attention — same day. If you live in or near an RHDV2-affected area (check your state wildlife agency's current reports), a sudden-onset illness in an otherwise healthy rabbit must be treated as RHDV2 until proven otherwise.
Do not wait. There is no time.
What to Do at Home (Prevention and Containment)
If you suspect RHDV2:
- Isolate any sick rabbit immediately from other rabbits
- Do not allow contact with other rabbits
- Call an exotic vet immediately — do not take the rabbit to a facility unannounced, as the virus can be spread in the waiting room
- Disinfect surfaces with 10% bleach solution, or Virkon S
Prevention:
- Vaccine: A licensed RHDV2 vaccine (Medgene Labs) is available in the US by veterinary prescription. Ask your exotic vet about vaccination — it is the most important protection you can provide.
- Keep rabbits indoors — limits contact with wild rabbits and insect vectors
- Change shoes and clothes after outdoor activities where wild rabbits may be present
- Quarantine new rabbits for at least 30 days before introducing to existing rabbits
- Do not share equipment between rabbit households
How Voyage Can Help
Voyage AI Vet can help you assess whether your rabbit's sudden symptoms require emergency exotic vet care — starting at $4.99/month. For RHDV2 concerns, always call an exotic vet directly as speed is critical.
Frequently Asked Questions
Q: Is RHDV2 in my state? A: RHDV2 has been confirmed in the Southwest (California, Nevada, Arizona, New Mexico, Texas), Midwest, and is expanding. Check the USDA APHIS website or your state wildlife agency for the most current map.
Q: Can RHDV2 spread to cats, dogs, or humans? A: No. RHDV2 is rabbit-specific. It poses no risk to other pets or humans.
Q: Can a rabbit survive RHDV2? A: A small percentage (20-30%) of infected rabbits survive, typically those with some prior immune exposure or milder strains. Supportive care can help, but there is no specific antiviral treatment.
Q: Is the RHDV2 vaccine widely available? A: The Medgene Labs vaccine is available in the US through licensed exotic vets. It requires two initial doses and annual boosters. Contact your exotic vet to discuss whether vaccination is recommended for your area.
Q: How do I disinfect after an RHDV2 case? A: RHDV2 is resistant to many common disinfectants. Use 10% bleach, Virkon S, or Tri-Cide NDX per label directions. The virus can survive in the environment for weeks, so thorough disinfection of all surfaces, cages, and equipment is essential before introducing new rabbits.
This article is for informational purposes only and is not a substitute for professional veterinary advice. For exotic pets, always consult a vet with exotic animal experience.