They say, ``you can't teach an old dog new tricks,'' but nobody has said anything about being unable to teach a bounty-hunting Dog new tricks. Which is good because after an eight-season run on A&E, Duane ``Dog'' Chapman brings his people-tracking skills to CMT, along with wife Beth and their son, Leland. But this time the Chapmans aren't searching for fugitives on their home turf of Hawaii. Instead, they travel to a different city each week and work with the local bondsman…