Colorado is a Fence Out State. Most Western states are. If you dont want livestock on your property, it is legally your responsibility to build an adequate fence to keep them out. Right or wrong that is the way it is.
That sucker isnt going to get any slack from juries in that area. People there in South Park dont cotton to the outsiders with luxury houses there anyway.
Do you have any evidence that the Free Range laws apply to Bison? I know that they typically only apply to cattle, horses and sheep. I know that Free Range Law does not apply to dogs, and wild animals for instance. I guess the question is whether Buffalo are considered domesticated or not.
I would have been inclined to shoot a few of the bison. (I wouldn’t have left them there to rot, though....I love bison meat. I eat at Ted’s Montana Grill every chance I get.)
“Fence Out” is an antiquated concept that is past its time. I’m surprised that Colorado hasn’t changed to “fence in” status.