Tracks but don't get fooled a hogs track can resemble deer tracks,goats and sheep.Hogs will have more rounded toes... Rooting, they love to root, in Texas, were we have lots of acorns they will certainly leave evidence they have been there. Wallows, are a great place to set up a blind. Scants (Droppings) will resemble dog dropping, and depending on what they have been feeding on they can leave patties, or can resemble human waste...
I can tell around my deer feeders, they have knocked them down, or left what resembles a beach volley ball sand when they are finished.