How to Perform Cardiopulmonary Resuscitation (CPR) CPR should only be performed on an unresponsive patient that is not breathing or has no heartbeat. Step 1: Prepare to perform ABCs by lying the pet on its side A = Airways: Is there anything blocking the pet's airways? Is there an obstruction in the mouth? B = Breathing: Is the pet breathing? Is the chest rising and falling? C = Circulation: Can you feel a pulse or hear a heartbeat? Step 2: Check Airways by opening the mouth and looking for any obstructions Step 3: Check Breathing by placing your hand on the chest and feeling for the rise and fall  Step 4: Check Circulation by feeling for a pulse on the inside of the hindlimb thigh Step 5: No breathing? No pulse? Perform artificial breaths by covering the muzzle to form a seal and breathing into the nostrils. Deliver 2 rapid breaths. Step 6: Perform chest compressions. To locate the heart, move the elbow up and against the chest. Where the elbow meets the chest is where you should start your compressions. Your palms should cover 1/3 to 1/2 the width of the chest. Perform approximately 30 compressions before giving the pet some breaths. Perform 1 full cycle of CPR in 2 minutes checking for voluntary breathing and a pulse in between.