1. Follow the ABC's. If your cat is not breathing and has no heartbeat start CPR.
If you can't convince yourself that your pet is breathing and has a heart beat within 15 seconds, start chest compressions.
2. Chest compressions
One handed technique: Wrap your hand around the sternum at the level of the heart with your thumb on the up side and the rest of the fingers underneath. Two handed technique: Place one hand over the other, with the heel of the hand directly over the heart. Lock the elbows, shoulders should be above the hands.
Compress 1 to 1/2 the width of the chest. Make sure the chest comes fully back up (recoils) before compressing.
3. Perform chest compressions at a rate of 100-120/ minute.
4. Perform cycles of 30 compressions and 2 rescue breaths.
Gently close the cat's mouth and extend the neck to open the airway. Cover the nose with your mouth and exhale until you see the cat's chest rise. Give a rescue breath over 1 second. As soon as 2 rescue breaths are delivered, resume compressions.
5. Briefly check for a heartbeat and spontaneous breathing every 2 minutes.
If there are two rescuers, switch jobs every 2 minutes. Minimize time with no compressions.
6. Continue CPR until you reach a veterinary hospital.
In the absence of CPR, there is little chance of reviving a dog beyond 10 minutes. Good quality CPR can buy you the time you need to get the cat to the vet.