Rabbit chewed an electrical cable: mouth burns, the delayed lung fluid, and the first 48 hours

Quick answer

Settle the rabbit before you look. A calm rabbit on a flat, non-slip surface lets you see the lips, the chin and the breathing without a struggle that makes both worse.

A rabbit that has bitten through a live cable needs a vet the same day even if it gets up, hops away and eats a piece of parsley. The dangerous parts of an electric shock are not the parts you can see.

Three things happen in sequence: the heart can be thrown out of rhythm in the first seconds, the lungs can fill with fluid in the hours after, and the burn in the mouth quietly grows for days. The rabbit often looks best on the first evening and worst on the third day.

• Cut the power at the socket or the consumer unit before you touch the rabbit. A rabbit in contact with a live cable will electrocute you too.
• Call an exotics or rabbit-experienced vet immediately, and say the words "electrical burn" so they know to expect breathing problems.
• Count the breaths per minute while the rabbit rests, and film it. That number is the single most useful thing you can bring.
• Watch the breathing for at least 48 hours, not just the first evening.
• Watch the appetite and the droppings for at least a week. A rabbit with a sore mouth stops eating, and a rabbit that stops eating develops gut stasis, which is what usually kills it.

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Do not touch a rabbit that is still touching a chewed cable.

Current flows through you as readily as through the rabbit. Switch the circuit off at the breaker or pull the plug from the wall first. If you cannot reach either, push the animal clear with something dry and non conducting, such as a broom handle or a wooden chair leg, never with your hands and never with anything damp.
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Decide in 60 seconds

Why one shock injures a rabbit in three separate ways

Electricity does not injure like a bite or a fall. It causes three different injuries with three different clocks, and owners get caught out because they only watch the first one.

The electrical injury, in seconds.

Current crossing the chest can disorganise the heart's electrical activity. This is what kills an animal instantly at the socket, and there is nothing an owner can do about it after the fact. A rabbit that survives the first minute has passed the highest risk moment for that particular mechanism.

The lung injury, over hours.

A large shock triggers an enormous surge of sympathetic nervous activity. Blood is shifted centrally, pressure inside the lung vessels rises sharply, and the walls of those vessels become leaky. Protein rich fluid then moves out of the circulation into the air spaces of the lung.

This is called non cardiogenic pulmonary oedema: the heart is not failing, but the lung is flooding anyway. It is well described after electrocution in companion mammals, and it does not need a dramatic shock to happen.

The important feature is the delay. The rabbit can be bright, eating and apparently normal on the first evening, then be in respiratory distress before morning.

The burn injury, over days.

An electrical burn in the mouth is a thermal injury with a wide margin of tissue that is damaged but not yet dead. That marginal tissue declares itself over the following days: it darkens, dries, then separates, and the defect underneath is larger than anything you saw on day one.

That is why a vet will usually not cut anything away at the first visit. The final extent of a burn is not knowable early, and removing tissue that would have survived makes the outcome worse.

What the mouth actually looks like

Have the carrier open and the kitchen scale out before you start. Weight, breathing rate and dropping count are the three numbers the vet will want, and all three are easier to collect before the rabbit is stressed.

Rabbits usually bite a cable across the mouth, so the burn sits where the cable sat: at the corners of the lips, along the front of the gums, on the tip or edges of the tongue, and sometimes on the ridged hard palate.

Look with the lips gently lifted at the front, in good light, without opening the jaw. A rabbit's mouth opens only a little, the cheek teeth are out of sight at the back, and forcing the jaw is both futile and painful.

On the first day the burn can be almost invisible: a pale yellow or greyish patch, a line of missing fur at the lip corner, a slightly leathery texture. Colour alone is unreliable early.

The more useful early signs are indirect.

Saliva.

Healthy rabbits do not drool. Wet fur under the chin, a damp dewlap or matted chest fur means mouth pain or difficulty swallowing, and it is one of the earliest reliable signs.

Singed whiskers and smell.

Whiskers that end in a curled bead rather than a fine tip have been burnt. A faint burnt smell on the muzzle points the same way.

Tooth grinding.

Loud, slow grinding is the rabbit pain signal. Do not confuse it with the soft, fast chattering of a contented rabbit being stroked, which is a different sound made at a different rhythm.

Selective eating.

Hay demands the most jaw work. A rabbit whose mouth hurts will abandon hay first, then pellets, and will often still take a soft leaf. Owners read that as "still eating" and lose two days.

The lung problem that arrives after the rabbit seems fine

The one measurement worth learning is resting respiratory rate: count chest or flank movements for a full minute while the rabbit is settled and not being handled, and write it down with the time.

The absolute number matters less than the trend in that individual animal. A rate that climbs steadily over an evening is meaningful even if any single reading looks unremarkable, and a rate that climbs while the rabbit is doing less is more meaningful still.

Watch the effort as well as the rate.

Normal rabbit breathing is almost invisible: a small, even flank movement with a still head and a folded, relaxed body. Trouble looks like nostril flaring, a head and neck stretched forward and up, elbows held away from the chest, and an exaggerated abdominal push at the end of each breath.

A rabbit that opens its mouth to breathe has run out of options. Rabbits are obligate nasal breathers, with a soft palate arrangement that makes mouth breathing difficult, so they only do it when the nose alone can no longer move enough air. Treat it as the last warning, never as the first.

Coughing is worth noting too. Rabbits rarely cough. Any repeated cough in a rabbit is abnormal and, in this context, points at the lungs.

Days two to seven: the mouth, the appetite and the gut

This is the phase that decides whether a rabbit that survived the shock survives the injury.

As the burn declares itself, pain increases rather than fades. Eating drops. A rabbit that eats less produces less gut movement, and a rabbit gut that slows down stops, which is gastrointestinal stasis.

Stasis is not a slow decline. Gas accumulates, the gut wall stretches, pain increases, the rabbit eats even less, and the loop closes. Rabbits die of this within days, and it is the usual cause of death after any painful injury to the head or mouth.

So the daily measurements after an electrical injury are not really about the burn.

Weigh the rabbit on a kitchen scale at the same time each day. Count the droppings in the litter tray and note their size, not only their presence: droppings that are getting smaller and drier are the first hard evidence that intake has fallen. Note what was offered and what was actually eaten.

Two other delayed problems belong to this window.

Tooth damage that shows up weeks later.

Rabbit incisors grow continuously from a germinal centre at the root. A burn to the gum and socket can damage that centre without breaking the tooth. The tooth then regrows crooked, at the wrong angle or at the wrong rate, weeks after everyone has stopped worrying, and a misaligned incisor no longer wears against its opposite number. Any rabbit with an oral burn needs a dental recheck later, not just a wound recheck.

A hole between mouth and nose.

A deep burn on the hard palate can break through into the nasal cavity as the dead tissue separates. Food and water then pass into the nose. The signs are sneezing while eating, food particles at the nostrils, and a nasal discharge that starts several days after the injury rather than at the time.

Telling this apart from the look-alikes

Owners often find a chewed cable and a subdued rabbit and reason backwards. Sometimes the cable is a coincidence.

That last question is worth asking properly. If the residual current device or breaker did not trip, and there is no scorch mark, no melted insulation and no exposed copper, the rabbit may have chewed a dead cable, a low voltage charger lead or an unplugged extension. The conversation with the vet changes completely.

What the vet will do, and what to bring

Expect the visit to be shaped around the delayed risks rather than around the mouth.

Breathing is assessed first, and a rabbit in respiratory distress will usually be put in oxygen before anything else is done. Handling a rabbit that is struggling to breathe can be enough to tip it over, so a good exotics vet will deliberately do less at first, not more.

Pain relief comes early, because a rabbit in pain does not eat and a rabbit that does not eat develops stasis. Ask specifically about a plan for pain relief at home, and how long it should continue.

Fluids are given cautiously. A leaking lung and generous intravenous fluids are a bad combination, so a vet may deliberately restrict fluid rates in the first day even in a dehydrated rabbit. That is a considered decision rather than an oversight.

Chest imaging may be repeated rather than done once, precisely because the changes appear late. A clear chest on arrival does not rule out oedema six hours later.

The mouth is usually assessed properly under sedation and treated conservatively at first. Antibiotics are not automatic, and are chosen with care in rabbits, since several classes that are routine in other species disrupt the rabbit hindgut and kill.

Feeding support and gut motility drugs are often started before the rabbit has actually stopped eating, as prevention rather than rescue.

Bring these:

• The time of the incident, and whether you saw it or found it
• Whether the circuit tripped, and a photograph of the cable
• Whether the rabbit lost consciousness, went rigid, or was ever unresponsive
• Resting breathing rate readings with times, and a phone video of the rabbit breathing while undisturbed
• Today's weight and the last known weight
• What has been eaten and drunk since, and how many droppings have appeared
• Vaccination history and any current medication

The routine that catches the delayed problems

Return the rabbit to its own space, with hay where it always is and the litter tray unchanged. Familiar surroundings make the appetite and dropping count meaningful, and a changed setup makes them impossible to interpret.

What never to do

Do not touch the rabbit before the power is off. This is the only part of the emergency that can add a second casualty.

Do not put butter, oil, ointment, honey, toothpaste or antiseptic in the mouth. Oral burns are managed by a vet, and greasy preparations in a mouth can be inhaled.

Do not syringe water or food into a rabbit with a burnt mouth on your own initiative in the first hours. If the palate is damaged or swallowing is painful, fluid goes into the airway. Ask first, then learn the technique properly.

Do not give human painkillers. Paracetamol, ibuprofen and aspirin are not appropriate rabbit analgesics at home, and dosing a small mammal by guesswork from human formulations is a common cause of a second, avoidable illness.

Do not force the jaw open to inspect the back teeth. You will not see them, and you may cause a struggle that injures the spine of a rabbit already under strain.

Do not accept "it seems fine" as the end of the story. The three injuries have three clocks, and only one of them has run by bedtime.

Preventing the next one

A rabbit back on full hay intake, producing normal droppings and breathing quietly at rest is the endpoint you are aiming for, and the only one that confirms the mouth has healed enough.

Rabbits chew cables because a cable is close to the shape and resistance their incisors evolved for, it lies at floor level where they live, and it runs along the edges of a room, which is where a prey animal prefers to travel.

That means prevention is about geometry and boredom, not about telling the rabbit off.

Remove the cable from the rabbit's plane.

Rigid trunking screwed to the skirting board, cables run above the rabbit's reach, or heavy furniture placed so the run is inaccessible. Soft spiral wrap slows a determined rabbit down rather than stopping it.

Unplug at the wall during free range time.

A dead cable that gets chewed is a repair bill. A live one is this article.

Fit residual current protection.

Called an RCD in the United Kingdom, Europe and Australia, and a GFCI in North America. It cuts the circuit when current leaks to earth, and it reduces the severity of many electrocutions. It is a genuine safety layer rather than a guarantee, because current passing through a rabbit from live to neutral may not trigger it at all.

Give the chewing somewhere legitimate to go.

Untreated willow, apple or hazel sticks, cardboard, seagrass mats and a deep hay pile. Chewing is not a vice to be trained out. It is continuous dental maintenance for teeth that never stop growing.

Address the underlying drivers.

Cable chewing spikes in rabbits that are confined too long, in newly free ranging rabbits exploring a space for the first time, and in entire rabbits during hormonal peaks. More floor time, more to dig and shred, and neutering where appropriate all reduce it.

Supervise the first week in any new space.

Most cable incidents happen in a room the rabbit has only just gained access to, or immediately after furniture has been moved and a previously hidden cable has become reachable.

When to get help

Go immediately, without waiting for an appointment, for any of these:

• Any increase in breathing rate or effort, at any point in the first 48 hours
• Open mouth breathing, blue or grey gums, or a stretched out neck posture
• Collapse, rigidity, weakness in the hind limbs, or loss of consciousness at any time
• No droppings for several hours, a hunched posture, or a belly pressed to the floor
• Refusing hay, or refusing all food, for more than a few hours
• Sneezing with food or fluid at the nostrils, at any point in the weeks afterwards

Call ahead rather than arriving unannounced. Rabbit competent emergency cover is uneven, and it varies enormously between countries and between city and rural areas. Knowing which clinic will actually see a rabbit at three in the morning is worth finding out before you need it, not during.

If the nearest emergency clinic does not treat rabbits, ask them to stabilise breathing and provide pain relief anyway, and to speak to an exotics vet by phone. Oxygen and analgesia are species neutral, and both buy time.