It's not possible in the game yet (without cheats) but in part 2 when Poisoned Mice are accessible we should be able to poison Honeyclaw. Not sure about the kits (they don't seem to accept poisoned mice when I've cheated them in).
If you want to use cheats press . on the keyboard. Then enter 'holditem' 'Poisoned Mouse' or 'killnpc' and then the character you want to kill.