The owners (and handlers) of five show dogs head for the Mayflower Kennel Club Dog Show. A film crew interviews them as they prepare for the trip, arrive at Philly's Taft Hotel, and compete. From Florida come the Flecks: she keeps running into old lovers. A wordless ancient in a wheelchair and his buxom trophy wife who may have a thing for the dog's handler own the two-time defending best in show,