We have horses and cows in the country. To keep them from roaming all over the place, owners put up fences, mostly barbed wire.
Still, sometimes the livestock find their way out. We’ve awakened to a very large mama cow next to our front porch. Or slowed our car down to wait on a couple of horses to get out of the way.
The fences aren’t perfect. A post will break, the wire will rust, a gate will be left open. And sometimes a curious bull wants to taste the grass on the other side and finds his way through.
Mostly the fences do the job.