Rabbit Flystrike Symptoms: The Summer Emergency to Check For Twice a Day

Flystrike is the reason experienced rabbit owners get into the habit of turning their rabbit over every single day in summer. Knowing the rabbit flystrike symptoms matters because this condition moves faster than almost anything else you will meet in rabbit keeping: flies lay eggs on damp or soiled fur, the eggs hatch within hours, and the maggots begin eating into living skin. A rabbit who looked fine at breakfast can be critically ill by evening. This guide is for owners of pet rabbits, indoors or out, and covers what to look for, what to do the moment you find maggots, and how to stop it happening in the first place.

What is flystrike in rabbits?

Flystrike, or myiasis, happens when blowflies lay eggs on a rabbit and the hatched larvae (maggots) feed on the rabbit's flesh. In the UK and much of northern Europe the main culprit is the green bottle fly, Lucilia sericata. Bluebottles are also involved. The flies are drawn to the smell of urine, droppings, blood and discharge, so damp or soiled fur is an open invitation.

The area around the bottom and genitals is by far the most common site. In a study of veterinary records from 389 UK practices, published in Preventive Veterinary Medicine in 2018, just over half of recorded flystrike lesions were around the perineum (the area under the tail), with a smaller number on the head or elsewhere on the body.

Two facts explain why this is treated as a true emergency. First, maggots can eat into a rabbit's flesh within about 24 hours of hatching, and eggs may hatch in a matter of hours in warm weather. Second, the outcome is often grim once damage is established: in that same UK dataset, around 45% of flystrike consultations ended in the rabbit dying or being euthanased. Caught early, though, rabbits can and do recover fully.

What are the symptoms of rabbit flystrike?

You are looking for two different things: the very early stage, when there are only eggs or tiny larvae and your rabbit may seem almost normal, and the advanced stage, when the rabbit is in shock.

Early signs, when treatment works best

• Small clusters of what look like grains of cooked rice or off-white sesame seeds stuck to the fur, usually around the tail, bottom, genitals or in skin folds. These are fly eggs
• Tiny pale maggots moving in the fur or in soiled areas
• A damp, matted or dirty rear end, or a rabbit who suddenly smells unpleasant
• Fewer or softer droppings than usual, or squashed caecotrophs (the soft, sticky droppings rabbits normally re-eat) stuck to the fur
• Restlessness: shifting position, twitching skin, digging into corners, sudden flinching when you touch near the tail
• Not eating breakfast with the usual enthusiasm, or ignoring a favourite treat

Red-flag signs of advanced flystrike

Call an emergency vet immediately if you see any of these:

• Visible maggots, especially large ones, or open, raw, bleeding skin
• A strong, sweetish, rotten smell from the rabbit or the hutch
• Sitting hunched and very still, hiding, grinding teeth, or not moving when approached
• Refusing all food and water
• Cold ears and feet, weakness, wobbliness or collapse
• Laboured breathing

A rabbit in this state is in severe pain and in shock. Rabbits also hide illness well, which is exactly why a hands-on check beats watching from across the room.

Which rabbits are most at risk?

Flystrike is usually a symptom of something else. Anything that leaves a rabbit damp, soiled or unable to groom raises the risk sharply:

• Overweight rabbits: they cannot reach round to clean their bottom or squat properly to toilet
• Dental disease: painful teeth stop a rabbit eating its caecotrophs, which then smear around the rear
• Arthritis and older age: the 2018 UK study found rabbits aged five and over were more than 3.8 times as likely to be presented with flystrike
• Soft stools or diarrhoea: often from too much sugary veg or fruit, sudden diet changes, or gut disease
• Urine scald: dribbling urine from bladder disease, spinal problems or E. cuniculi keeps the skin permanently wet
• Unspayed females: the same study found entire females were around 3.3 times more likely to be affected than neutered females, and large dewlaps and skin folds trap moisture
• Long or dense coats: angora and lionhead types, and any rabbit with a woolly rear
• Open wounds, abscesses, sore hocks and weepy eyes: all attract egg-laying flies
• Dirty or damp housing: soiled bedding left in place draws flies straight to the rabbit

Warm weather is the multiplier. The UK researchers calculated roughly a third higher risk of flystrike for every 1°C rise in environmental temperature, with cases starting earlier and peaking higher in the south. In practice, treat the whole warm season as risk season, not just heatwaves.

What should I do if I find maggots on my rabbit?

Act as if the clock is running, because it is. Flystrike is an emergency at 3am on a Sunday just as much as at 10am on a Tuesday.

1. Phone your vet or the nearest emergency practice right now: say the words "suspected flystrike" and that you need to be seen immediately. Do not wait for a routine appointment slot.
2. Do not put your rabbit in water: trying to drown the maggots does not work, and soaking a rabbit who is already in shock can make things much worse. Wet fur also clogs the clippers your vet needs to use.
3. Keep her calm, warm and quiet: a carrier with clean, dry bedding, indoors, out of direct sun and away from flies. Rabbits in shock lose body heat, so keep her comfortably warm without overheating her.
4. Remove what you can see, if it does not slow you down: the Rabbit Welfare Association and Fund advises picking off visible maggots with tweezers as long as it does not delay the trip to the vet. Advice varies here, and some charities prefer owners not to attempt it at all. The safe middle ground: lift off loose maggots and eggs sitting on the fur surface, never probe into wounds or under the skin, and stop the moment it becomes a reason you are still at home.
5. Bring her bonded companion if you have one: it reduces stress for both and helps keep the pair together afterwards.
6. Do not give any human painkillers: ibuprofen and paracetamol are not safe rabbit medicines.

Even if you find only eggs and no maggots, get her seen or at minimum speak to your vet the same hour. Eggs mean flies have already chosen your rabbit as a site.

What will the vet do?

Expect a hospital admission rather than a quick consult. Treatment usually involves sedation or a general anaesthetic, because clipping and picking maggots out of damaged skin is far too painful to do on a conscious rabbit. Your vet will clip the fur, flush and clean the area, and remove maggots and eggs as thoroughly as possible. Products that kill larvae, such as ivermectin or nitenpyram, are sometimes used alongside manual removal.

Alongside that, your rabbit will need strong pain relief, fluids for shock and dehydration, antibiotics if the wounds are infected, and assisted feeding with a syringe formula to keep the gut moving. Dead tissue may need to be cut away, and wounds are usually rechecked and redressed over several days. Where the damage is extensive and the rabbit is already in deep shock, euthanasia is sometimes the kindest decision, and a good vet will tell you honestly which situation you are in.

Your vet should also hunt for the underlying cause: teeth, weight, mobility, bladder, gut. Fixing that is what stops it happening again next month.

How do I prevent flystrike?

The twice-daily bottom check

The RSPCA, PDSA, Blue Cross and the Rabbit Welfare Association all give the same core advice: in warm weather, check your rabbit all over at least twice a day, with particular attention to the rear end and tail base. It takes under a minute per rabbit.

• Sit down and support her body, or place her on a non-slip surface. Never dangle a rabbit by the scruff
• Part the fur around the anus, genitals, tail base, inner thighs and belly, and look at the skin, not just the coat
• Check any wound, scab, sore hock or skin fold, plus eyes and dewlap for dampness
• If the area is dirty, clean it straight away with warm water and a shampoo made for small pets, rinse, and dry thoroughly. Damp fur attracts flies too, so drying matters as much as washing
• If the skin is red, raw or scalded, ask your vet for pain relief and a barrier cream rather than repeatedly scrubbing it

Housing, diet and body condition

• Remove soiled litter and wet bedding daily, and site the litter tray away from where she sleeps
• Fit fly screens over hutch and run openings, and use hanging fly traps or sticky papers well out of reach of your rabbit
• Feed a hay-and-grass-based diet with measured pellets and introduce new greens gradually, so stools stay firm and formed
• Keep her lean enough to reach her own bottom, and get any weight, dental or arthritis problem assessed rather than tolerated
• Consider neutering females, and book a check if you notice urine dribbling or a permanently damp rear
• Long-coated rabbits benefit from having the fur around the bottom trimmed short for summer. Ask your vet or a rabbit-savvy groomer to do it safely

Preventive products

Topical products containing cyromazine, an insect growth regulator that stops fly eggs developing into damaging maggots, are widely used in the UK during fly season and typically give protection for around eight to ten weeks. They are a useful extra layer, not a substitute for daily checks. Availability differs by country, so ask your own vet what is licensed where you live. Never use dog or cat flea products on rabbits without veterinary advice; some, including fipronil-based spot-ons, have caused serious harm in rabbits.

Can indoor rabbits get flystrike?

Yes. The risk is lower, but flies get through open windows and doors, and a house rabbit with a soiled bottom is just as attractive to them. Blue Cross specifically warns that indoor rabbits can be affected and should still be checked daily. If your indoor rabbit has a litter tray habit that leaves her damp, or she has any of the risk factors above, check twice daily just as you would with an outdoor rabbit.

The takeaway

Flystrike is fast, painful and often fatal, and it is also one of the most preventable emergencies in rabbit medicine. Two things carry almost all the weight: a hands-on check of your rabbit's rear end twice a day through the warm months, and treating any maggot or fly egg you find as a reason to phone a vet immediately rather than in the morning. If you are ever unsure whether what you are looking at is serious, call. No vet will mind being asked about a rabbit's bottom in July.

This guide is general information and does not replace an examination by your own vet, who knows your rabbit.