Flystrike (myiasis) is a true rabbit emergency in which flies lay eggs on a rabbit's skin and the hatched maggots eat into living tissue, sometimes within hours. It is most common in warm months and in rabbits with soiled, damp rear ends. A rabbit with visible maggots or sudden lethargy and a wet bottom needs emergency veterinary care immediately.
Last reviewed: June 2026
What Is Flystrike in Rabbits?
Flystrike, medically called myiasis, occurs when flies — usually blowflies or greenbottles — lay eggs on a rabbit's skin and the emerging maggots burrow into and consume living flesh. Flies are attracted to moisture, urine, feces, and the scent of broken skin, so they target the rabbit's perineum, tail base, and any soiled or wounded area. Eggs can hatch in as little as a few hours in warm weather, and maggots release tissue-digesting enzymes and toxins that cause rapid, deep wounds and life-threatening shock.
What makes flystrike so dangerous is its speed and the toxic shock it produces. As described in Quesenberry and Carpenter's Ferrets, Rabbits and Rodents, affected rabbits can deteriorate from apparently mild surface irritation to collapse within a single day as bacterial infection and absorbed toxins overwhelm the body. The AEMV Pet Care Guides, 2024 emphasize that any rabbit with a soiled rear in fly season should be checked at skin level twice daily, because maggots hide in the fur and are easy to miss until the wound is advanced.
Recognizing the Signs
The earliest sign is often subtle restlessness or a rabbit that suddenly seems "off," but visible signs progress quickly. Owners should physically part the fur around the tail and rear to inspect the skin, since maggots and eggs are hidden beneath the coat.
Early signs:
- A wet, soiled, or matted rear end with a foul smell
- Small clusters of cream-colored eggs (like tiny grains of rice) in the fur
- Restlessness, digging, or repeatedly turning to nip at the back end
- Reduced appetite or sitting hunched
Advanced signs (emergency):
- Visible maggots crawling on or burrowing into the skin
- Open, raw, foul-smelling wounds
- Sudden profound lethargy, weakness, or collapse
- Cold ears and unresponsiveness as toxic shock develops
Maggots seen anywhere on a rabbit constitute an emergency. Even a few eggs warrant same-day care, because the time from egg to flesh-eating maggot can be measured in hours, not days.
Why It Happens
Flystrike is almost always secondary to an underlying problem that leaves the rabbit unable to keep its rear clean. Anything that produces a damp, soiled bottom invites flies. Common predisposing factors include obesity (the rabbit cannot reach to groom), dental disease that causes drooling and sticky fur around the face, arthritis limiting mobility, urine scald from incontinence or a dirty hutch, chronic soft stool from an imbalanced diet, and unspayed females with skin folds.
Environmental factors matter too: outdoor hutches in warm, humid weather are highest-risk, and uncleaned bedding accelerates the problem. As described in Quesenberry and Carpenter's Ferrets, Rabbits and Rodents, correcting the underlying cause — whether it is diet, dental disease, obesity, or housing hygiene — is essential, because treating the maggots without fixing why the rear was soiled simply sets the rabbit up for a repeat episode.
Diagnosis and Treatment
Diagnosis is visual: a vet parts the fur, identifies eggs or maggots, and assesses how deep the wounds extend and whether the rabbit is in shock. Treatment is an emergency and is far beyond home care once maggots are present.
Veterinary treatment includes:
Stabilization: Rabbits in shock receive warmth, IV or subcutaneous fluids, and pain relief before wound work begins. Pain management is critical, and validated rabbit pain scoring guides analgesia, as described in Benato et al., 2019, JSAP.
Maggot removal: The area is clipped and every maggot is physically removed; missed maggots continue to burrow. Larvicidal products may be used to kill remaining larvae.
Wound care and antibiotics: Damaged tissue is cleaned and sometimes surgically debrided, and systemic antibiotics treat secondary bacterial infection.
Supportive nursing: Because flystrike rabbits often stop eating, assisted feeding and gut-motility support help prevent secondary GI stasis. As described in Quesenberry and Carpenter, maintaining gut function is as important as treating the wound itself.
With prompt, aggressive treatment, mild cases can recover well, but extensive myiasis with deep wounds and shock carries a poor prognosis. Early intervention is the single biggest factor in survival.
Prevention
Prevention is highly effective and centers on keeping the rear clean and dry. Check your rabbit's bottom at least twice daily during warm months, address any cause of a soiled rear (diet, dental disease, obesity, arthritis), clean hutches frequently, and use fly screens on outdoor enclosures. Preventive products that stop fly eggs from developing are available and especially valuable for at-risk rabbits. The AEMV Pet Care Guides, 2024 stress that a high-fiber, hay-based diet keeps droppings firm and the rear clean, which is the foundation of flystrike prevention.
When to See a Vet
Call your vet today if:
- You find fly eggs (rice-like clusters) in your rabbit's fur
- Your rabbit's rear is soiled, damp, or smells foul
- Your rabbit is restless, nipping at its back end, or eating less
- You cannot keep the rear clean because of an underlying problem
Go to the ER immediately if:
- You see maggots anywhere on your rabbit
- There are open or raw wounds near the tail or rear
- Your rabbit is suddenly weak, collapsed, cold, or unresponsive
- Your rabbit has stopped eating and producing droppings
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Frequently Asked Questions
How fast can flystrike kill a rabbit?
Flystrike can become life-threatening within 24 hours. Blowfly eggs can hatch into flesh-eating maggots in only a few hours in warm weather, and the toxins they release, combined with secondary infection, drive rabbits into shock rapidly. This speed is why any maggots or eggs found on a rabbit require emergency, same-day veterinary care.
Can I remove the maggots myself at home?
No. While you can gently brush off visible eggs while arranging emergency care, you should never attempt to fully treat flystrike at home. Maggots burrow deep into tissue, are easily missed in the fur, and require clipping, professional removal, pain control, and antibiotics. Home attempts delay critical treatment and worsen the prognosis.
What does it cost to treat rabbit flystrike?
An emergency exotic exam typically runs $100–250, with wound clipping, maggot removal, and treatment adding $200–600 depending on severity. Severe cases needing hospitalization, IV fluids, and surgical debridement can total $800–2,000 or more. Catching it at the egg stage and treating the underlying cause is dramatically cheaper than an advanced case.
Which rabbits are most at risk for flystrike?
Rabbits that cannot keep their rear clean are most at risk: overweight rabbits, those with dental disease, arthritis, urine scald, or chronic soft stool, and any rabbit in a soiled outdoor hutch during warm weather. Long-haired breeds and unspayed females with skin folds are also predisposed because their fur traps moisture and feces.
How do I prevent flystrike in summer?
Check your rabbit's bottom at least twice a day in warm months, keep the enclosure scrupulously clean and dry, feed a high-fiber hay-based diet so droppings stay firm, and fit fly screens to outdoor hutches. Treating any underlying cause of a dirty rear and using a vet-recommended preventive product offers strong protection during peak fly season.
Still Not Sure if Your Rabbit Needs a Vet?
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