There are lots of breeders in Nebraska, but not many that I would recommend, for varous reasons. Since you are interested in working lines, I would recommend either contacting Steve Sudik - near Wahoo, NE (north between Lincoln and Omaha), or Susan Dooling in the Omaha area. I know of a couple of show line breeders in the state that I would recommend, but that doesn't seem to fit what you were looking for. Good Luck!!