Garmin is synonymous with GPS tracking, as much as Irish Setters are with hunting and your roommate is with leaving the bar unannounced, only to deadbolt the door and not remember any of it in the morning. All reasons we're looking forward to the multi-use Astro Dog Tracking System. The DC 50 Dog Device tracks up to 10 dogs, or drunks, at up to a nine mile range — utilizing a GPS/GLONASS receiver — so you'll be comfortable setting them loose in whatever environment. Its counterpart Astro 320 Handheld provides "customizable dog display" where you see the name, direction, distance and status of whatever the device is attached to. And with bark detection, you'll be constantly alerted to updates, such as when your friend is tossing cookies out of the taxi window. Finally, the "Activity Logging" keeps track of what happened, and when. Perfect for the morning after when figuring out why your roommate woke up with no shoes on and $600 down (which is what these systems run).