Flystrike happens when flies lay eggs on a rabbit's soiled bottom and maggots hatch within hours, eating into living tissue. It can kill within 24 to 48 hours. Daily butt-checks in warm months are non-negotiable. Any maggots seen = ER immediately.
Last reviewed: May 2026
Why Flystrike Is a Rabbit-Specific Emergency
Flystrike (myiasis) happens when blowflies — especially green and blue bottle flies — land on a rabbit's soiled or damp fur, lay eggs, and the eggs hatch into flesh-eating maggots within 6 to 24 hours. Rabbits are uniquely vulnerable because of their dense fur, the difficulty they have grooming their own rear, and their habit of producing soft cecotropes that can stick to fur. Death from shock, toxemia, and sepsis can occur within 24 to 48 hours of maggot hatch. The condition is most common in warm months but can occur anytime flies are active (Cousquer, 2006, In Practice).
Risk Factors
Overweight rabbits cannot reach their own bottom to groom. Older rabbits with arthritis have the same problem. Long-haired breeds (Angora, Lionhead) trap urine and soft feces in fur. Diarrhea or any soft stool, dental disease (which causes drooling), urinary incontinence, and damp hutches all raise risk dramatically. Outdoor rabbits with poor housing hygiene are at highest risk; indoor rabbits can still get flystrike if flies enter the home (AEMV Pet Care Guides, 2024), as described in Quesenberry & Carpenter's Ferrets, Rabbits & Rodents.
Early Signs to Catch Before It's Too Late
The earliest sign is the rabbit sitting unusually still in a corner, often with damp or matted fur around the bottom. Fly eggs look like tiny rice-grain clusters on the fur. Once maggots are present, you may see them visibly moving in the fur or skin. The rabbit may smell strongly, look listless, refuse food, and develop a hunched posture. Within hours, shock symptoms — pale gums, weak pulse, cold ears — appear.
Treatment Is an ER Visit
Flystrike is never a wait-and-see problem. Vet treatment includes clipping all affected fur, manual removal of every maggot under sedation (general anesthesia for severe cases), thorough cleaning, debridement of dead tissue, fluids, pain medication, and antibiotics. Imidacloprid-based products (Rearguard, Xenex) are sometimes used as both preventives and treatments. Survival to discharge is roughly 50 to 70 percent for early cases and under 30 percent for advanced cases with extensive tissue damage.
How to Prevent Flystrike
Daily butt-checks during warm months — physically look at and feel under the tail every single day from late spring through early fall. Keep weight in healthy range so the rabbit can groom. Treat any soft-stool or urinary problem immediately; soft stools mean too many pellets, not enough hay, or dental pain. Clean the litter box twice daily. Use fly screens on windows. Keep outdoor hutches scrupulously clean. Consider a topical preventive (cyromazine, imidacloprid) for high-risk rabbits — discuss with your exotics vet.
When to See a Vet
Not every symptom is a midnight emergency, but some warrant same-day attention and a few are true ERs. Use the lists below to sort which bucket you're in.
Call your vet today if:
- Visible fly eggs on fur (tiny white clusters that look like rice)
- Damp, smelly, or stained fur around the bottom
- Rabbit suddenly sitting still in a corner and not eating
- Any soft stool or diarrhea in warm weather
- Drooling or wet chin (often dental disease — also raises flystrike risk)
Go to the ER immediately if:
- Live maggots seen anywhere on the rabbit — go now
- Visible skin damage, open wounds, or exposed tissue
- Rabbit unresponsive, collapsed, or with cold ears
- Strong rotting smell from the rear
- Rabbit refusing all food and water in summer heat
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Frequently Asked Questions
How fast does flystrike kill a rabbit?
Flies lay eggs within minutes of finding soiled fur. Eggs hatch in 6 to 24 hours depending on temperature. Once maggots are eating tissue, shock and toxemia can develop within 12 to 24 hours and death within 24 to 48 hours. There is no margin for waiting — same-hour ER visit is correct.
How much does flystrike treatment cost?
Initial exotics-vet exam runs $80–200. Sedated maggot removal, clipping, and wound cleaning costs $400–1,000. Hospitalization for 1 to 3 days with IV fluids, pain medication, and antibiotics runs $500–1,500 per day. Total cost for a survivable case typically lands $1,500–4,000. Exotic vets charge about 1.5 to 2 times standard small-animal rates. Topical preventives (Rearguard) for prone rabbits cost $30–50 per 10-week course.
Can indoor rabbits get flystrike?
Yes. A single fly that gets indoors can lay eggs on a soiled rabbit in minutes. Risk is lower indoors but not zero — especially in summer with open windows or pets bringing flies in. The same daily butt-check rule applies regardless of housing.
What if I find dead-looking maggots?
Treat the rabbit as if they were alive. Dead-looking maggots may still be hatching, larvae may have burrowed into tissue, and the rabbit needs full clipping, cleaning, and antibiotic coverage for the bacterial infection that accompanies tissue damage. Go to the ER.
Still Not Sure if Your Rabbit Needs a Vet?
When you're not sure if this is wait-and-see or call-tonight, Voyage AI Vet triages in under 2 minutes. Describe what you're seeing in chat, share photos of your rabbit's bottom and tail area, any wet or matted fur, or the food bowl, or hop on a live video call if you want a second pair of eyes. Every answer comes with citations to the actual veterinary literature it's pulling from — so you see exactly where the guidance comes from, not just a chatbot's word.