I recall seeing wild pigs on our family's ranch in the Texas Panhandle in the 1950's, so they have been around a long time.
A guy I used to work with went pig hunting on a ranch outside Waco; he called home and told his wife to go buy another freezer. He said they shot eleven pigs in one day.
He said he intended to clean them himself, but they he saw all of the ticks on the first one they shot, and he decided to let the ranch hands do the cleaning and butchering.
I guess that you want to avoid shooting the boars because the meat is kind of rank.
Rufus