The whole idea in junior rodeo is to foster the next generation of cowboys and cowgirls.Think of it as the Little League for rodeo."It's a sport where you can't really just go out and do it," said Roxanne Usher, organizer of this year's Douglas County Junior Rodeo. "It takes a long time to break into it. That's part of what we do."This year's Douglas County Junior Rodeo is set for Saturday and Sunday, starting at 8 a.m. both day. Admission is free."The whole idea is to show a progression of the ranching lifestyle," Usher said. "As a junior (6-9 years …