The problem behind the lack of population control in the south where the problem is the worst is that once a population has been established they reproduce so rapidly it is almost impossible to get ahead of it. They can have 3 litters a year and they can have the first litter before they are a year old from what I understand. I do not see poison being a solution because of the risk of secondary poisoning. Who ever laid the poison would have to be on site to immediately remove the carcasses in order to do it safely. Trapping is the better solution and in areas of the south those trapped hogs are provided to food banks and utilized, something you cannot do with poisoned animals. Short of a disease that would rage through out the populations, I doubt we will ever see the end of wild hogs in the US. Remember, it was the Spanish explorers who initially brought them here and released them for food for themselves. How long ago was that? Just look at how much flooding there has been in the south because of hurricanes etc. Flooding breaks up sounders and spreads them to places they may not have been and then they expand their populations there. I believe they are here to stay.