I lost my dog Sapphire on 11/14/15 and was devastated! I entered her name on lostmydoggie.com and received a call she was found two days later. As soon as your information has been entered, faxes and emails are sent right away to pet businesses.
It's a fantastic idea to have an alert for pets too. Print out and put up flyers too. Sometimes having a microchip and collar with information doesn't help. My dog was in a crawl space of a building and her cries were heard. I had put up a flyer on the tree where I last saw her. The building was across the parking lot. Don't give up! Let lostmydoggie.com help you too. Dawn and Sapphire