I’m not saying that Hawn was right, but didn’t Downare have some obligation to keep his animals on his property? It sounds like this went on for some time, with the rancher not making much of an effort.
“South Park residents say that under Colorado’s open-range laws, it is the duty of property owners to erect fences to keep cattle and bison out. It is not the duty, they said, of the rancher to fence cattle and bison in.”
—for much info on this, search both Denver Post and Rocky Mountain News about three to five months ago—