On the Trail of UFOs: Night Visitors: In the 1960s the cattle mutilation phenomenon became a widespread concern across the American west. Cases erupted around states like Wyoming, South Dakota and Colorado of livestock being preyed upon in ways that puzzled even established scientists. Today, cattle mutilations are thought to go hand in hand with mysterious objects in the skies (commonly referred to as UFOs or UAPs) and that’s what first brought indie documentary crew Small Town Monsters and investigator Shannon LeGro to the Miller Ranch in southern Colorado.