1903  At dawn the next day a sheepherder seeking lost Sheep discovered her from a neighboring hill.
1953  . . . the majority of Alberta sheep are out on range in care of a "sheepherder." (Not a "shepherd" in the West, where terms vary from traditional phrases.)
1963  . . . the men who are the backbone of the range sheep industry [are] the sheepherders, as we call the Scottish, Mexican, or Basco (Basque) shepherds.