Once released into the wild pigs are tough to eliminate. For that reason among others Vermont outlawed canned hunting operations which is the usual way they escape into the wild. I think there is a wild pig population now in western NY which came from a game farm. I understand the F&W department wanted trapping rather than shooting to eliminate them. I understand that pigs are very smart and hunting actually makes them more wary and harder to kill. I believe their plan was to locate, trap with nets and kill the whole herd. I haven't heard of the results but expect they still have pigs. I would think they should just make them a predator with an open season, allow night shooting and no limits. Put a bounty on them would probably save money in the long haul.