How to Perform Pet CPR: Golden Time and Steps for Cardiac Arrest

ImmunityQ&AMeongsiljang Veterinary Advisory Board

We’ve outlined the step-by-step CPR procedure and important precautions that pet owners can perform on-site for dogs and cats suspected of cardiac arrest, organized by weight.

What Is Pet CPR?

A pet owner sitting beside the dog, preparing to perform chest compressions.

Pet CPR is an emergency procedure that restores blood and oxygen circulation to dogs and cats whose heart and breathing have stopped, using chest compressions and rescue breaths. The most critical step is to determine whether cardiac arrest has occurred within 10–15 seconds and begin compressions immediately. According to veterinary emergency and critical care textbooks, the discharge survival rate for animals in cardiac arrest is only 6–7%; however, when pet owners initiate CPR quickly on-site, the chances of recovery at the hospital increase significantly.

Three Signs Suggesting Cardiac Arrest

There are three main signs that suggest cardiac arrest: the pet is unconscious, not breathing, and has no detectable pulse. According to veterinary emergency and critical care guidelines, you should spend no more than 10–15 seconds assessing these signs, quickly checking the airway, breathing, and circulation within that time. - Check for responsiveness: No reaction when calling the pet’s name or gently pinching a paw. - Check for breathing: No visible movement of the chest or abdomen. - Check for circulation: Gums appear pale or blue, and no pulse can be felt on the inner thigh.

Chest Compression Location and Position by Weight

Item	Small dogs/cats (2–10kg)	Medium dogs (10–25kg)	Large dogs (25kg or more)
Compression location	Directly over the heart (behind the left foreleg)	Widest part of the chest	Widest part of the chest
Hand position	Wrap one hand around the chest	Both hands stacked, pressing down	Both hands stacked, pressing down
Compression depth	1/3–1/2 of chest thickness	1/3–1/2 of chest thickness	1/3–1/2 of chest thickness
Position	Lay on the side	Lay on the right side	Lay on the right side

Based on the RECOVER veterinary emergency guidelines; for brachycephalic breeds with round chests such as Bulldogs and Pugs, laying them on their back and compressing the sternum is recommended.

How to Perform Chest Compressions

For chest compressions, aim for a rate of 100 to 120 compressions per minute, with a depth of about one-third to one-half of the chest's width. For medium and large dogs, place them on their right side and use both hands on the widest part of the chest. For small dogs and cats, use one hand to cup the heart area and compress. It is crucial to slightly lift your hands after each compression to allow the chest to fully recoil. Continue compressions without interruption in two-minute cycles. Only pause to check the rhythm or switch compressors at the end of each two-minute cycle, and resume compressions immediately after checking. A good way to maintain the correct pace is to match the beat of a song with a tempo of around 100 BPM, such as "Stayin' Alive."

Example of proper hand placement when performing chest compressions on a dog

What Never to Do During CPR

The most dangerous mistake during CPR is frequently pausing chest compressions. If you stop compressions to check for a pulse or clear the airway, blood flow to the brain will immediately drop. Never perform chest compressions on a conscious animal (one that is breathing or moving on its own). Only quickly remove food, vomit, or toys from the mouth with your fingers, then immediately resume compressions. Additionally, do not press too lightly on small animals, as this will be ineffective.

Rescue Breathing and the 2-Minute Cycle

For rescue breathing, close the mouth and cover the snout, then place your mouth directly over the nose and blow gently for one second until you see the chest rise slightly. Veterinary emergency guidelines state that basic life support consists of chest compressions combined with rescue breathing (ventilation), and emphasize that breaths should be delivered at a steady, regular interval—neither too fast nor too forceful. However, when breathing via the mouth-to-snout method without intubation, it is practical to pause compressions briefly while delivering each breath. In a clinical setting where endotracheal intubation has been performed, ventilation can continue asynchronously without interrupting compressions. If two or more people are present, switch the person performing compressions every two minutes to maintain proper depth and rate. If working alone, briefly check breathing and pulse at the end of each two-minute cycle, then immediately resume compressions.

Performing artificial respiration on a puppy's nose

Transport to the Hospital After Return of Spontaneous Circulation

Even if spontaneous circulation returns, immediate transport to a veterinary hospital is essential. Animals that have experienced cardiac arrest are at high risk of another arrest within hours, and complications such as cerebral edema, lung injury, and arrhythmias may follow. During transport, position the animal on its right side to maintain a clear airway, and wrap it in a blanket to prevent hypothermia. Call the hospital ahead of time to provide the time CPR was started, its duration, and your estimated arrival time so that intravenous access and oxygen therapy can begin immediately upon arrival.

Prepare in Advance to Improve Survival Rates

To avoid panic in the event that CPR is needed at home, it’s essential to prepare in advance. Save the phone numbers and directions to two or three 24-hour emergency veterinary hospitals, and keep a note with your pet’s weight, underlying health conditions, and current medications near your front door or on your phone. For small-breed dogs, senior dogs, or those diagnosed with heart disease, simply watching a RECOVER-based CPR training video beforehand can significantly improve your response time in an actual emergency.

Reviewed by a veterinarian

Dr. Tony — Punnawat Phongkittirak

Veterinarian

A veterinarian who majored in veterinary medicine at Khon Kaen University, Thailand, and completed the IVSA program at North Carolina State University in the United States. Drawing on clinical experience at animal hospitals, he works in the pet healthcare field and is dedicated to building a digital care environment that connects pet parents with veterinarians.

Frequently Asked Questions

Are there significant differences between performing CPR on dogs and cats?

The basic principle is the same, but the technique differs depending on the animal: for cats and small dogs, use one hand to cup the chest and apply compressions; for medium and large dogs, interlock your fingers and press on the widest part of the chest. The rate and depth remain the same: 100 to 120 compressions per minute, at a depth of one-third to one-half of the chest width.

What should I do if a rib breaks during cardiac massage?

In cases of cardiac arrest, maintaining blood flow to the brain and heart is far more critical than the risk of rib fractures. Continue CPR with consistent pressure without stopping, and have your pet evaluated at a veterinary clinic once spontaneous circulation is restored.

How long should CPR be continued?

As a general rule, do not stop CPR until spontaneous circulation returns or a professional veterinary team takes over care. This principle also applies during transport to the hospital; continue CPR without interruption in the back seat of the vehicle.

Can a human AED (automated external defibrillator) be used on pets?

Human AEDs are not recommended for home use on pets because their body weight, chest structure, and electrical resistance differ from those of humans, which means their effectiveness and safety cannot be guaranteed. Instead, treatment should be performed at a veterinary clinic using a veterinary-specific defibrillator.

Where can I get CPR training?

Some university-affiliated animal hospitals and emergency specialty clinics offer caregiver education programs based on the RECOVER framework. You can ask your regular vet clinic about these resources or refer to the official RECOVER online educational videos for helpful guidance.

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References

[1] Fletcher DJ, Boller M. Cardiopulmonary Resuscitation. Small Animal Critical Care Medicine, 3rd Ed, Elsevier

[2] Fletcher DJ, Boller M, Brainard BM, et al. RECOVER evidence and knowledge gap analysis on veterinary CPR. J Vet Emerg Crit Care, 2012

[3] Hopper K, Epstein SE, Fletcher DJ, Boller M. RECOVER evidence and knowledge gap analysis on veterinary CPR. Part 3: basic life support. J Vet Emerg Crit Care, 2012

[4] Smarick SD. Cardiopulmonary Resuscitation. Advanced Monitoring for Small Animal Emergency and Critical Care, 2nd Ed