arlo, abigail, crocket, loki, gibbs and kodachrome. this is the final heat before settling who goes to the final rounds. - [shellene] way out in front, wow. we have crocket in the yellow collar making it over the hurdles and bee-lining it straight into the tunnel, followed by arlo in blue. staying focused and not getting off-track, going after that lure, because it looks like foxes tail, and that's what they were bred to do. they were actually bred solely by one man, jack russell, back in the mid-1800s who was an avid fox hunter, hence jack russel hurdle racing. - [trace] all right, hunting for gold here at the national championship finals, it'll be trubel, vinny, rooster, bolt, crocket, and arlo, it all comes down to this final heat. who will take home the national championship? on course. - [shellene] right here, ohh, three coming right up, but we have rooster in the yellow collar, five-year-old male who made it through first. followed by crocket in orange, and trubel in blue. - wow - all of the dogs staying on course though, none of