Here is an excerpt from that article:

When my husband and I adopted two kittens from our local humane society in Rochester, N.Y., they were already microchipped. As soon as we got Mango and Dash home, I also insisted our indoor-only kittens learn to wear collars with their names and our phone number on them – just in case they ever managed to get outside. While I knew the two best preventative measures to protect my  kittens in the event they got lost, I was completely unprepared when Dash lived up to his name and dashed away shortly after we moved to northern Virginia. My husband and I did the obvious things first: go out searching and make posters, but we have since learned there are more things to consider when a pet goes missing. Whether you’re looking for a cat or a dog, most of the steps to finding a lost pet are the same.