Unfortunately, eradication isn't possible, given that these super pigs have been breeding and roaming free for 20 years. The US and Canada must limit their presence by focusing on the root cause of the issue: uncontained reproduction. Rather than slaughtering these animals, there should be an effort to implement birth control measures and, more importantly, recognition that this is a self-inflicted problem that calls attention to the problematic practice of cross-breeding.
It's true that there's no magic solution to completely eradicate wild hogs, but since about half of these feral swine make their way to Texas, authorities should ramp up the poisoning tactic that's shown the potential to be very successful in the state. If landowners can program them to eat from a hog-specific feeder and use non-toxic bait during the weeks leading up to the lethal bait, they can eventually start killing these pigs effectively.