Judging by the big hogs those are not free range or at least they were not before you got there. Take a look at the hog photo gallery one. I think it was six pictures in there is a picture with two guys two hogs around the 150 lb range and one small hog. The large black pig on the right has a ear notch. I use to raise pigs and these notches represent numbers by where the are located and serve as a ID for the hog which means that pig is not wild. After looking through gallery two, I saw three pigs in it that appeared to have notches. The notches don't mean as much to me as the size of some of these. Pigs don't get that big when they have been on there own from the first day of life and grow up in the wild. The boars and sows that I raised would get that big, however some would not even with the best of care. Many of these are still showing breed characteristics, which means they have not been out for long. Once in the wild for several years they loose those characteristics and are just ugly. This may be a place where a lot of hogs have been released either to get the population going or just because some guy could not afford the feed anymore. It has been several years ago but I use to buy pigs at pauls valley and there were alot of guys raising them for show pigs there, who knows how they got there but they do appear to be free range at the time of kill at least.
