there is no way control feral hogs, a sow can have 3 litters a year, 8-12 pigs per litter, when she is having her 3rd litter, the first litters is havin babies. if unchecked a population of hogs can double every 4 months. in oklahoma after a pig gets over 30 pounds it has basically has no predators but man, coyotes will take a few youg pigs.
hogs become trap shy after a few have been trapped from the sounder, even with dogs and hunting at night it is impossible to curb the hog population.