WATCH: Happy ending for runaway dog found in train tunnel

Pup named Roo, who ran away from home, was found curled up next to rail track – and was ‘thrilled’ to be rescued A two-year-old pitbull who ran away from home braved two days in a dim San Francisco railway tunnel before being rescued. Caltrain operators spotted the pup named Roo…

Roo is back with his owner after train operators in San Francisco spotted him hunkered down in a tunnel, where he had apparently been since running away two days earlier.