Out here in the sticks of Iowa we can see this "rewilding" happening naturally. Mountain Lions which hadn't been seen around here since the late 1800's are now sighted rarely, but with increasing frequency. The first one known to have been in Iowa in that long was killed near my home. Bald eagles are now common, when I was a kid they were never seen. Wild Turkeys are now a nuisance, with flocks of them in urban areas, also never seen in my youth. And on and on the list goes. No wolves yet, but there has been the odd moose and last year a black bear.
As everywhere those who live in the cities think that this is a wonderful thing and farmers, like the shepherd in the story, feel the pain and often feel this is very unfair.