FWIW--
I'm on the Red River in South central Okla. in the dark blue area on the map.Nearly all of the hogs around here are the ones that have reverted to the more feral type.Dark color,longer hair,etc.
A while back,a hunter got lost near the River and some of the Search and Rescue guys were pretty spooked by the time they got out of the brush because the hogs are so thick.
From personal experience,I could add a lot of blue to that map in Okla. and there are places in Mo. and Ks. that are having hog problems now that not long back didn't have any at all.
About the only thing as bad as hogs are trap thieves but I do know of at least one of them that's decided stealing traps isn't a very healthy enterprise. ;)