When we were on the home ranch the last time, a guy bought the ranch next to us to raise bison.
I told him he needed to upgrade the fences considerably.
He told me Wyoming law decreed that land owners had to “fence things out,”not in.
I told him that the first time a bison appeared on our land I would call him and tell him the location of the critter. The second time I would tell him where the carcass was.
He was the owner of a high tension power line construction company and they erected a 10 foot high fence using seven rows of power cable and electrified five of them.
We got along pretty well.
They eventually sold the ranch and moved the bison to a ranch on the Colorado state line south of Cheyenne.