How to resuscitate a dog (or a cat!)

Few things are as frightening for an owner as watching a dog or cat suddenly lose consciousness, stop breathing, or fail to respond to being called or touched. Your heart pounds, your hands shake, and one thought crowds out everything else: what now? It's hard to stay level-headed in a moment like that, and yet a handful of simple, orderly steps, combined with staying as calm as you can, can genuinely improve an animal's chances of surviving long enough to reach a vet. In this article we explain, step by step, how to recognise a life-threatening emergency in a dog or cat, what the universal ABC approach to first aid involves, how to correctly perform chest compressions and rescue breaths, and how to safely and quickly get an injured animal to a veterinarian.

How to Recognise a Life-Threatening Emergency

Before doing anything else, you need to assess the animal's condition quickly but methodically — acting in a chaotic way without first working out what's actually wrong won't help, and every second counts in a life-threatening situation. It's worth always following the same order: consciousness, breathing, then pulse and heartbeat.

Checking Consciousness

The first step is checking whether the animal is conscious. Try gently touching it, calling its name loudly, clapping close to its ear, or gently pinching a toe pad. A healthy, conscious animal will respond with movement, a blink, pulling its paw away, or at least a change in muscle tone. No response at all to any of these, along with an obviously limp body and no eye contact, is a sign that the animal is unconscious and needs an immediate check of its breathing and circulation.

Checking Breathing

The next step is working out whether the animal is breathing. Watch the chest and abdomen for a moment — in a breathing animal, you'll see a rhythmic rise and fall. If watching alone doesn't give you certainty, hold your hand or cheek close to the animal's nostrils to feel for airflow, or hold a small mirror or another shiny surface in front of the nose — fogging on the surface shows that air is being exhaled. No breathing movements at all is one of the key warning signs and the basis for going on to check circulation.

Checking Pulse and Heartbeat

The easiest way to check the circulation is to feel for a pulse on the femoral artery, pressing your fingertips against the inside of the thigh, in the groin area where the hind leg meets the body. Alternatively, you can try to feel the heartbeat by placing your hand or ear against the chest just behind the elbow of the front leg, on the left side of the animal's body. No detectable pulse and no detectable heartbeat, combined with no breathing and no consciousness, means the heart has stopped and you need to begin cardiopulmonary resuscitation (CPR) immediately.

Safety First — Yours and the Animal's

Before you start giving first aid, it's worth keeping one thing in mind: even the calmest, friendliest animal can bite when it's in pain, panicking, or disoriented. That's a defensive reflex, not a matter of temperament or spite. A bite in this kind of situation isn't a sign of aggression — it's a natural response to extreme stress, so there's no reason to take it personally or blame the animal for it.

If a dog or cat is conscious and there's a real risk of being bitten — for example with an obvious injury, severe pain, or heightened agitation — it can help to improvise a muzzle from a bandage, a belt, a scarf, or a lead. Loop it over the muzzle, cross it under the jaw, and tie it behind the ears, snug enough to keep the mouth closed while still letting the animal breathe freely through its nose. There are, however, several situations where you should never muzzle an animal: if it's vomiting or feels nauseous, if it's struggling to breathe or breathing with visible effort, or if it has an injury to the muzzle, jaw, or nose area. In these cases, a muzzle could cause the animal to choke on vomit or make already-compromised breathing even harder, which is far more dangerous than the risk of a bite.

The second safety consideration is the surroundings where you're giving aid. If it's possible, and doing so won't put the animal at further risk, move the injured dog or cat to a safe spot, away from the road, traffic, or other hazards. People giving first aid get hit by vehicles too, when they focus entirely on the animal and stop paying attention to what's going on around them.

The ABC Rule of Animal First Aid

Just as in human first aid, a simple, easy-to-remember ABC approach helps when dealing with an animal in a life-threatening condition. Each letter stands for the next stage of the process, and it's worth sticking to that order — there's little point clearing the airway if you then forget to check breathing, and starting chest compressions before the airway is clear significantly reduces how effective the whole resuscitation will be.

A for Airway — Clearing the Airway

A stands for Airway. Gently tilt the animal's head back and pull the tongue out to the side so it isn't blocking the entrance to the throat — this is the simplest way to clear the airway of an unconscious animal, whose relaxed tongue muscles can, just as in people, cause an obstruction all on their own. If you can see a foreign object in the mouth — a piece of a toy, a twig, or anything else — you can try to carefully remove it with your fingers, provided it's clearly visible and easy to reach. Never reach blindly deep into the throat, since you risk pushing the object in further or injuring the animal or yourself.

B for Breathing — Rescue Breaths

B stands for Breathing. If the animal still isn't breathing on its own after the airway has been cleared, you can begin rescue breaths using the mouth-to-nose technique, mainly used for dogs, or the mouth-to-nose-and-mouth technique, which covers both the nose and the mouth and works well for cats and small dogs. Close the animal's mouth with your hand so air doesn't escape sideways, seal your lips around the nostrils, and give a calm, gentle breath, watching at the same time to see whether the chest rises in response. If the chest doesn't respond, check that the airway really is clear and gently adjust the position of the head before trying again.

C for Circulation — Chest Compressions

C stands for Circulation. If the animal is unconscious, isn't breathing, and you can't detect a pulse or a heartbeat, you need to start chest compressions — cardiac massage that mechanically forces blood to keep circulating until the heart starts working on its own again, or until the animal is handed over to a veterinary team. We cover this part in a separate, detailed section below, since the technique differs depending on the animal's size.

How to Perform Chest Compressions (Cardiac Massage)

The correct technique for chest compressions depends above all on the animal's size and build. Below we describe the two most commonly taught variants — for large dogs, and for small dogs and cats — along with the general rate and depth guidelines, which stay the same regardless of the patient's size.

Large Dogs

For large dogs, lay the animal on its side, ideally on a firm, stable surface — a soft mattress or rug absorbs some of the force and reduces how effective the cardiac massage is. Compress the chest at its widest point, roughly halfway along its length, rather than directly over the heart or the breastbone. Perform the compressions with the heel of one hand, reinforced by the other hand placed on top, just as in human resuscitation, with your arms straight and positioned perpendicular to the animal's chest, so that the force comes from your whole body rather than just your arm muscles.

Small Dogs and Cats

For small dogs and cats, a different technique is usually used — cup one hand around the chest on both sides, just behind the elbows of the front legs, with your thumb on one side and your remaining fingers on the other, then rhythmically compress the chest by bringing your thumb and fingers together. The animal can stay lying on its side for this, though some rescuers prefer to hold a small animal in this position, lifting it slightly off the ground. Both methods are acceptable, as long as the compressions are rhythmic and deep enough to genuinely compress the chest.

Rate and Depth

Regardless of the animal's size, the standard, widely taught parameters for chest compressions are a rate of around 100–120 compressions per minute and a depth of roughly 1/3 to 1/2 of the width of the chest. Just as important as the depth is making sure the chest has time to fully recoil between compressions — incomplete recoil limits how much blood can return to the heart between compressions and reduces how effective the whole resuscitation is.

The Compression-to-Breath Cycle

The standard recommended cycle is 30 chest compressions to 2 rescue breaths, repeated in alternation. If only one person is giving first aid, they pause briefly after a series of 30 compressions, give 2 rescue breaths using the method described above, then go back to compressions. If two people are on hand, they can split the tasks — one doing compressions, the other rescue breaths — and it's also worth swapping roles roughly every 2 minutes, since giving effective chest compressions is physically demanding, and a tired rescuer's compressions quickly lose depth and regularity.

Is Resuscitating a Cat Different From a Dog?

Resuscitating a cat is, at its core, based on exactly the same principles as resuscitating a dog — the same ABC sequence, the same 30-compressions-to-2-breaths ratio, the same goal of restoring circulation and breathing. The differences come down mainly to size and the force of the compressions: for a cat, as for a small dog, you use the one-handed technique around the chest just behind the elbows, and the compressions themselves need to be gentler than for a large dog, while still deep enough to genuinely compress the chest. It's also worth remembering that a cat's airway is narrower, so clearing it and carefully checking the mouth and throat for any obstruction matters even more than it does for large dogs.

Holding the animal steady during resuscitation can also look a little different. Even when unconscious, cats tend to be more prone to sudden muscle spasms or reflexive twitching of the limbs than dogs, so it helps to hold a cat firmly but gently in position, ideally with a second person steadying the head and front legs. For large dog breeds, on the other hand, the bigger challenge is often simply getting the animal onto a firm surface, especially if the emergency happens somewhere awkward — in that situation, what matters most is finding the flattest, most stable surface nearby, rather than carrying the animal a long way in search of ideal conditions.

When to Start CPR — and When Not To

You should only start CPR when an animal meets all three of these conditions at once: it's unconscious, it isn't breathing on its own, and you can't detect a pulse or a heartbeat. If any one of these is different — the animal responds to stimuli, it's breathing even shallowly or irregularly, or you can feel a pulse despite the lack of breathing — the correct response is something other than full CPR, and it's best to decide on next steps over the phone with a vet while already on your way to the clinic.

What to Avoid When Giving First Aid

Knowing what to avoid matters just as much as knowing what to do — in the heat of an emergency, it's easy to make well-intentioned decisions that end up making things worse for the animal.

Don't give the animal any medication, including human pain relief or sedatives, without first consulting a vet. Many common items from a household medicine cabinet are toxic to dogs and cats even in small amounts, and trying to "help" this way on your own can end up doing more harm than the original injury or illness ever would.

Don't treat first aid as an alternative to seeing a vet, even if the animal seems to be improving. The most dramatic symptoms settling down — breathing returning after CPR, for instance — doesn't mean whatever caused the heart or breathing to stop has been resolved. The animal should always be examined by a vet, even if it looks perfectly fine again by the time you reach the clinic.

Don't wait for absolute certainty that the situation is truly serious before acting. In practice, it's better to start checking consciousness, breathing, and pulse right away than to lose time wondering whether stepping in is even necessary — simply assessing the animal's condition can't cause any harm, even if it later turns out that full resuscitation wasn't actually needed.

Don't forget about your own safety and the safety of anyone else at the scene. Helping an animal on a busy road without first securing the area puts the rescuer at risk of a second accident, which does nothing to help the injured animal. If there are children or other pets around, ask someone, where possible, to move them a safe distance away — partly for their own safety, and partly so the person giving first aid can focus entirely on the injured animal without extra chaos nearby.

Don't give up too soon. Even if the first moments of resuscitation don't bring any visible improvement, it's worth continuing — ideally while also getting to a clinic as fast as possible — rather than writing the situation off as hopeless too early.

The Most Common Causes of Cardiac and Respiratory Arrest in Animals

A wide range of situations can lead to cardiac or respiratory arrest in a dog or cat. The most common include:

• drowning or inhaling water, which can happen during bathing or after falling into a pool, pond, or river,
• electric shock, most often from biting through an electrical cable, particularly in young, curious animals,
• choking on a foreign object that blocks the airway — a big enough topic that it deserves its own separate, detailed discussion; here we mention it only as one possible cause among others,
• a road traffic accident, meaning being hit by a vehicle, which causes extensive injuries often affecting several organs at once,
• poisoning, for example from medications, chemical products, certain plants, or foods that are toxic to animals,
• overheating and heatstroke, especially dangerous in summer, in animals left in a hot car or exercising hard in the heat,
• anaphylactic shock, a sudden, body-wide allergic reaction, for example to an insect sting or a medication,
• severe blood loss from an injury, leading to hypovolaemic shock and secondary cardiac arrest.

Knowing the likely cause doesn't change the CPR technique itself, but it can matter a great deal for how the vet proceeds once you arrive, so it's worth remembering the circumstances of the emergency and passing them on to the veterinary team as soon as you get there.

Getting to the Vet During and After First Aid

First aid at the scene is only the beginning — the next, equally important step is getting the animal to a veterinary practice as fast as possible. If there are two of you, it's worth continuing resuscitation on the way there too: one person drives while the other keeps up chest compressions and rescue breaths, provided the space in the vehicle allows it. Giving full CPR single-handedly while also driving isn't realistically possible, so if you're on your own, the priority becomes reaching the clinic as quickly as you can, rather than keeping up compressions at all costs.

Before you even arrive, it's worth calling our practice or the nearest 24-hour veterinary clinic to let the team know you're coming in with a patient in a life-threatening condition, briefly describing the situation. That gives the staff time to prepare the treatment room and the equipment they'll need before you get there, which genuinely shortens the time before proper treatment can begin.

During transport, the animal is best laid on its side on a stable surface — a blanket, towel, or mat, for instance — so it doesn't slide around under braking or when turning. It's also worth covering the animal with a blanket or towel: an animal in a life-threatening condition loses body heat quickly, which further worsens the outlook, so keeping it at a stable temperature is an important, if sometimes overlooked, part of care on the way to the clinic.

First Aid and Senior Pets

There's a reason our training courses with Centrum Szkoleń Animalia cover not just first aid but also caring for pets in their senior years — the two subjects are closely linked. Older dogs and cats deal with heart disease, organ failure, and other chronic conditions far more often than younger animals, and these raise the risk of a sudden decline in health, including cardiopulmonary collapse. That's why it's worth being especially alert to warning signs in a senior pet, such as sudden weakness, difficulty breathing, fainting, or episodes of losing consciousness, and acting on them straight away rather than waiting to see if they pass on their own.

Regular veterinary check-ups, tailored to the animal's age and health, make it possible to catch conditions early that could otherwise lead to sudden cardiac or respiratory arrest down the line. Knowing the basics of first aid — the ABC approach and chest compression technique included — matters particularly for owners of older animals, since it's this group of patients where life-threatening emergencies crop up more often than in young, healthy animals. That's why we encourage owners of older dogs and cats not to keep putting off check-ups "until later," and to come and see us at the first worrying sign rather than waiting for things to get worse.

First Aid Kit for Dogs and Cats

Every home with a pet should ideally have a basic first aid kit, put together in advance rather than assembled in the middle of an emergency. Useful items for a kit like this include:

• sterile gauze for dressing wounds,
• an elastic or self-adhesive bandage to secure a dressing,
• saline solution for rinsing and cleaning wounds,
• disposable gloves,
• a blanket or towel, useful both for covering the animal and as an improvised stretcher,
• a ready-made muzzle, or a strap or lead you can improvise one from if needed,
• a torch, useful for checking the pupils and for giving first aid in poor light,
• a carrier, for safely transporting a cat or small dog,
• the phone number for our practice and for the nearest 24-hour veterinary clinic, written down somewhere easy to find, in case the emergency happens outside our opening hours.

Simply having a kit like this at home won't replace knowledge and a level head in a crisis, but it does cut down your reaction time considerably — instead of hunting for what you need under pressure, you can just reach for a kit that's already put together.

First Aid Training — Our Partnership with Centrum Szkoleń Animalia

The theoretical knowledge in this article is a good starting point, but nothing replaces actually practising these skills under an instructor's supervision. For over 2 years, together with Centrum Szkoleń Animalia, we've been running first aid courses for dogs and cats — in person to begin with, and now also as online classes. During these courses, participants learn to recognise life-threatening emergencies, the ABC approach, chest compression and rescue breathing technique, and — something just as important to many owners — how to care for pets in their senior years and manage the health issues typical of that stage of life.

The subject of animal first aid, which we deal with every day at our practice, has also reached a wider audience — we were invited onto Pytanie na śniadanie – TVP (a Polish morning show), where we talked viewers through how to resuscitate a dog or cat. We'd encourage you to watch that segment as a complement to what's covered in this article, and, if at all possible, to take a full course as well — it offers far more than reading ever can, including the chance to practise the technique on a training mannequin, ask an instructor questions, and get comfortable with the whole procedure before you ever actually need it.

Frequently Asked Questions

Can I perform chest compressions on a conscious animal?

No. Chest compressions are only for unconscious animals that aren't breathing and have no detectable pulse or heartbeat. Performing them on a conscious animal that's breathing and responding to stimuli is unnecessary and can cause injury, including broken ribs or damage to internal organs. If the animal is conscious but showing other worrying signs, the right move is to get it to a clinic as fast as possible, not to attempt resuscitation.

How long should you keep performing CPR?

There's no single universal answer to this, and we're deliberately not giving an exact number of minutes here, since it could be misleading. In practice, you keep going for as long as you can, ideally until the animal is handed over to a veterinary team who can take over, or until it starts breathing on its own. What matters most is arranging transport to a clinic at the same time, rather than performing CPR in one spot without making any attempt to reach a vet.

Can you perform CPR on your own, without a second person to help?

Yes, although it's considerably harder and more tiring than doing it with someone else. On your own, you alternate between series of chest compressions and rescue breaths at the 30:2 ratio described earlier. If at all possible, it's worth asking anyone nearby for help as quickly as you can — even someone who doesn't know the technique can call the clinic or drive the car in the meantime, leaving the rescuer free to focus entirely on the animal.

Does a puppy or kitten need a different technique than an adult animal?

The general ABC approach and the 30-compressions-to-2-breaths ratio stay the same, but with very small, young animals you need to be extra careful about how much force you use, since their chest is far more delicate than an adult animal's. In practice, you use the one-handed technique, just as with cats and small dogs, adjusting the force to match the patient's size and age.

What should you do if the animal starts breathing on its own during CPR?

If the animal starts breathing on its own, regularly, during resuscitation, stop the chest compressions — they're not performed on an animal whose heart is beating and who is breathing. At that point, it's best to place the animal in a stable side-lying position, keep watching its condition, and carry on getting it to a vet as quickly as possible, since breathing coming back doesn't mean the danger has passed or that further veterinary assessment is unnecessary.

Is it worth taking a first aid course for animals?

Definitely. No article, however detailed, can replace actually practising the techniques under an instructor's guidance — it's hard, for example, to fully convey in writing just how much force is right for a particular size of animal. That's why we'd encourage you to take a first aid course, such as the ones we run together with Centrum Szkoleń Animalia, either in person or online.

Can incorrectly performed resuscitation harm an animal?

Yes, which is why it's so important to follow the principles laid out here, and above all to make sure the animal really is unconscious, not breathing, and has no detectable pulse before you start chest compressions. Compressing too hard, positioning your hands incorrectly, or performing CPR on an animal that doesn't need it can all cause injury. Even so, when circulation and breathing have genuinely stopped, attempting resuscitation according to these principles is always a better choice than waiting idly to reach a clinic.

Knowing how to recognise a life-threatening emergency in a dog or cat, and how to perform resuscitation correctly, won't replace professional veterinary care, but it can buy precious minutes before the animal reaches a vet's hands. We'd encourage you to learn these principles well before you ever need them, and ideally to practise them at one of our courses, run together with Centrum Szkoleń Animalia. At the Hau-Miau clinic at ul. Siemieńskiego 23 in Warsaw's Ochota district, we're ready to help your pets both in sudden life-threatening emergencies and with everyday, preventive care at any age. Book a visit — call +48 22 823 35 63.