My dad wants to get Gray Dawntreader microchipped because he is the kind of dog that people will steal, and Treader is very trusting anyway. I read in the Dog Bible that microchips (unlike my dad thought) are not traceable by satilite, and can only be read by someone with a microchip reader. The Dog Bible was written 3 or 4 years ago, so microchips have probably improved since then. Have they? Can a satilite be used to find a microchipped, lost (or stolen) dog?