Feral hogs have become invasive species into the southern landscape. They are causing millions of dollars of damage to southern agriculture and forestry. They also compete with wildlife for the food sources. This is a link to a manual for managing wild pigs. This comes from the APHIS USDA site.
https://www.aphis.usda.gov/wildlife_damage/feral_swine/pdfs/managing-feral-pigs.pdf