See Spot run. See Spot run away. See Spot's GPS. See Spot found. That, in a nutshell, is the story of a tiny GPS unit called SpotLight. The 2.5-ounce device, which easily attaches to a dog's collar, is scheduled to be marketed by the American Kennel Club beginning next month. The SpotLight will be priced at $250. Dogs can be located on the SpotLight Web site by cell phone, smartphone, or PC. Dog owners can text message or call into the American Kennel Club service to receive the location of their dogs "anytime, anywhere in the U.S. with pinpoint accuracy,"...