Thank you PetLink, for notifying me about Sonic, my Chihuahua/Terrier mix. The lawn service left my gate open and Sonic got out of the yard. After I got your voice mail and emails, I called a family member to go check the house for my other dog. They found a note from the neighbor who had found Sonic and picked her up. So this is to say thank you for getting in touch so fast and to let you know that Sonic has been returned home safely! I’m so glad to know this system really does work quickly!