Ensure your cat is microchipped and your contact information is current and up to date. You can update your contact details by contacting the pet microchip registry your cat is enrolled with. Visit the company’s website to get their phone number or to update your cat's info online. Not sure which microchip your cat has? Call your vet and ask. It will be in your cat's veterinary records. Get a collar—we love Furocious Kitty's unique designs (etsy.com/ shop/furociouskitty)—with an ID tag that clearly states that your cat is an indoor cat and should be returned to his home if found, such as Bad Tag’s “If I’m Out I’m Lost” tag. ($13, etsy.com/shop/BadTags) Make sure your cat is up to date on all shots, and flea and tick treatments. When outdoors, cats can pick up things indoor-only cats simply aren’t exposed to.