Some people train for months for a running race, but a fighting fit dog can just turn up on the day. A canine from Alabama in the US has become an internet star after running a 21km half- marathon and finishing in an impressive seventh place with a time of 1:32.56.Ludivine, a two-and-a-half year-old pet, sneaked out of her owner's garden and joined runners at the start of the Trackless Train Trek Half Marathon.Her owner, April Hamlin, told Runner's World magazine that her pet regularly wanders off without her in the town of Elkmont."I saw her for the first time in the parking lot before the race," said one resident. "She came bouncing up and I petted her on the head. I saw her collar, so I just figured she was somebody's dog. Elkmont is a small town where everyone knows everybody, so it didn't strike me as unusual."Another said: "Every time I thought she had dropped off to go home, I would hear her coming back up to me, and she would race past me up to the two leaders. She would run off to romp through streams and into yards to sniff around for a while."The race organisers sent her owner pictures of Ludivine at the finish line, tongue out, with a shiny finisher's medal draped proudly around her neck. ..