Before you and your pooches head out to hunt innocent ducks this year, you might wanna check out Garmin's new Astro 320 dog tracker -- a handheld GPS device designed to help hunters keep even closer tabs on their four-legged sentries. The latest addition to the Astro family can simultaneously track up to ten hunting dogs per receiver, with a revamped antenna and three-axis electronic compass covering up to nine miles of flat terrain. Boasting a 20-hour battery life, the 1.7GB handheld can also tell hunters whether their canines are running or pointing, w
