From my hunting buddies in LA, you will want a special contraption that will leg snare a hog. Its basically a modified foot hold trap that holds the snare in place. When the hog steps on the trap, it slings the snare up around the hogs leg past its joint above the dew claws. IF it cinches down correctly you have him by the only place a snare will hold em.
Trying to snare a hog by the neck typically doesn't work and is illegal in a lot of places. You need a heavy cable with a big loop which dramatically increases the likely hood of non target catches. A mad hog will tear up most legal size gear in Tn if you caught it by the neck. If you get one of its feet, its balance is off and it cant pull as hard.
From what they tell me, snaring hogs is a waste of time and effort, success rate is very low.
