Thanks guys.
On today's training ride, two blocks from my house, there was a dachshund wandering around in the street. No collar. Really docile but scared. A woman in a car stopped and together we knocked on a bunch of doors, but no one knew him. The woman said she worked at a vet hospital and she took him to work with her to find out if he was chipped and try to find the owner.
Not sure if that was the right thing, but it seemed like if we just left him running around by himself he would get run over, he was just a few hundred feet from a busy road.
Hope he gets home all right!!