Well, that is when I like to shoot them. This hog was a great example. He would walk a few feet, stop, sniff, listen, and then repeat the process. They will often stand still for a couple of second to several seconds as they check their surroundings. If you watch the pattern and are ready, it makes for a much easier shot. As soon as I got the rifle on him and steadied, dropped him with a shot to the side of the face.
I was a bit surprised to see a hog. It seems some hog doggers came through the property, UNINVITED over the weekend.