Wolf fang you get from the wolf boss in the morning, top right skull in the first part of the dungeon (outside). Werewolf boss is at night at a ! near the bottom right area. As for werelogan, you can try silver weapons, lust potions, wearing armor, bringing your dog or raptor with you (trained for combat, "help") and save scumming (save when the fight begins, do a turn, reload if you get hurt, save again if he misses you until you win).