I hunted in a conservancy where a farm owners wife had a pet female warthog. "Hoggles" was fine with the family but super territorial with anyone else. She would let you pet her if being held by the owner but would bluff charge and get all sorts of irate at any other time. I still remember the three of us (PH included) hiding behind lawn chairs and trying to fight off Hoggles who, by the way, had been hand raised since a piglet.