Interesting! I had no idea you had feral boar in southern England. Here in Western Canada, we have to contend with black bear and coyotes who have been displaced from their own habitat by encroaching humans. The coyote, in typical trickster fashion, are doing quite well; the bear less so. We also have the odd young cougar. Locally, we once had a cougar strollling into the Empress Hotel (almost the symbolic equivalent of Buckingham Palace...). I think it was just zapped with a stun gun and removed to a better habitat, not killed, but these incidents are always somewhat dodgey for the animals. On the other hand, similar ecological experiments, such as "farmed" buffalo, and wolves in national parks, seem to have been quite successful, so who's to say? I understand your misgivings, though.
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