If they're on your property, I think you can shoot them wherever you want.
Of course, I never researched the validity of that. It's just what everybody told me when I lived there.
The law/requlation I thought was much more interesting, though, was that in Austin, no one is required to wear anything above the waist - male or female. I saw this in action the first weekend I was in Austin (exercised by females). From then on I know that Austin was a magical place.
I'm not sure about gun regulations in NM (where I live now), but I do know that there are a couple of counties here where it's REQUIRED that you carry a firearm by law. I try to stay away from those particular counties.
- trs