 One sow or mother hog can produce two litters every year with an average of 12 piglets per litter. And that's why these numbers can increase so quickly. And they're moving north. Legislators in the Ohio House of Representatives last week unanimously approved legislation that would ban the importation of feral hogs into that state and prohibit ownership of feral swine. Legislators say this is needed after landowners brought up feral hogs for use in canned hunts in the state.