I've been concerned about wild boar invading the farm. Evidently they have made it to the next county. About a month ago, saw a road kill pig on the road into the farm. Grey and black, just looked like a pig. How do you tell the difference from a regular farm pig and a wild pig/boar? I know that these feral populations have escaped pigs (or their genes) in them. If I see a pig on my dad's property I am shooting it, but is there a clear way to tell if it is some local escapee or part of the coming invasion?