Hello friends. I would like to get your help: I have a very small puppy dog. He tends to hide under beds and wardrobes, not answer calls, and make us very worried until we find him. I would like to buy a device to make it easier to find my dog indoors. A device that, through a remote control or iPhone application, emits some sound so that, when I hear it, it guides me to where my dog is hiding or sleeping. I've looked, but I haven't found it. In fact, I'm not sure how to look, or where to look. Does this exist?