question #1 yes I believe that hogs have a better sense of smell than deer have. Question #2 don't know but they don't see nearly as well as deer do. It is actually pretty easy to stalk up on hogs as long as you have got a good wind. Many times have had them walk up to me and not even act they know that it is danger. On another note have watched them walk into my wind lift there head take 2 big breaths and turn and run back to where they came from.