Ok random idea, was wondering if any of you might know if something like this exists.. Lol.. So my fianc?e and I want to get a miniature pinscher or chihuahua, but she also wants a guard dog.. I had an idea that a collar with a microphone on it to amplify and deepen the pitch of the little dog's bark could probably scare away anyone it needed to! Lol! Anyone know if anything like this exists or how I could make something like this? Haha