More than likely they are tagged, to let a hunter know they are "bar" hogs, a boar that has had his man hood taken away. This is what we are doing now too. You catch them, cut them, put a bright colored tag in the ear and release. A few months or so go by, see him with the tag, know he's a bar hog, shoot and eat. A bar hog is much better eating than a boar, especialy here in cent. FL!