1. According to the ASPCA, if your pet needs CPR you should: Check to see if he's breathing. If not, place your dog or cat on his side and begin CPR. 2. Administer rescue breaths. Gently extend your pet's neck, then holding his jaws closed, form a seal by placing your mouth over your pet's nose. Blow into his nostrils every 3 seconds. Make sure that no air escapes between your mouth and his nose. 3. Pump hard, pump fast. If you don't feel a heartbeat, deliver 3 quick chest co