This guy is a bozo and under no way should be allowed to claim ignorance. note this excerpt from the Park County, Colorado web site, The code of Park County:
“Ranchers often work around the clock, especially during calving and haying seasons. Hay is often swathed or baled at night and ranch equipment may be in constant use during the period. Livestock are sometimes moved along or across highways and county roads. Courtesy dictates that you pull over and patiently allow the livestock to pass. After all, the cows were here first. Colorado has an open range law which means ranchers are not required to keep livestock fenced in. If you do not want cattle, sheep or other livestock on your property, it is your responsibility to fence them out.....What else can we say? If you choose to live in the rural countryside, enjoy the scenery and remember, this is the real West!
Do not expect county government to interfere with
the normal operations of our ranching community. Colorado has “Right to Farm” legislation that protects farmers and ranchers from nuisance and liability lawsuits and allows them to continue producing food and fiber, regardless of how new residents feel about their country neighbors.
http://www.parkco.us/Documents/Emergency%20Management/Code%20of%20Park%20County.pdf
As I recall, he did have fence up that would keep "cattle, sheep or other livestock" off his property, but Bison are a completely different story, and the property owners claims and complaints were totally ignored.
Shooting the Bison was wrong, but at least half the blame belongs to the Bison owner.
Hawn inflamed the situation by hiring illegal alien activists to slaughter his neighbor’s livestock.
The question is whether Buffalo are considered domesticated livestock or not. I would say no and you’re saying yes.