The sheepherders reference an actual sheep/cattle feud called the Pleasant Valley War between the cattle-raising Graham family and the sheep-raising Tewksbury family. The feud lasted for nearly ten years and was immortalized by Zane Grey in his book "To The Last Man: A Story of the Pleasant Valley War".
Doris Day wrote in her 1975 autobiography that this was one of the films that she did not want to do but was forced to do because her husband/manager Martin Melcher had power of attorney and signed her for it without her knowledge or consent. She called this a "second-rate television western" that required her to get up at 4:30 every morning. However, she did enjoy the camaraderie of the cast members.