1. Try petting your cat with one finger in the area of shoulder blades2. Gently pinch up the loose skin between cat's shoulder using your thumb and index finger3. If you can't feel the chip, check both sides of your cat's shoulders
If a chip has migrated, or is a malfunctioning one, a vet can take an x-ray of a cat to find the chip. So, if you have trouble finding the chip yourself, don't worry, since you have a professional to help you!