We body shoot them to get them to run off and die out of sight out of mind. The coyotes and carrion birds need to eat too and they think hogs are yummy.!
If we don't want to eat them we leave them for the coyotes or mountain lions to eat though we always try to kill them on the spot and then drag them off. Even though they are taking over and do a lot of damage we try not to make them suffer just like we would any other animal we shoot.