For those worried about their household fluffies turning into the real-life version of Homeward Bound, there are wearables no more the size of a doggie treat such as Tractive's line of GPS Pet Trackers. Combined with the accompanying mobile app, owners can get a real-time bead on their pet’s location, as well as see a 24-hour history of their whereabouts. You can even create a virtual fence within your home and have the app alert you the instant a pet crosses it.