I found some older information from a few years ago on this forum post: viewtopic.php?f=77&t=12480&p=99262&hilit=spike#p99262
Seems like it only works with a select few herbs that are not poisonous with very small amounts of water if it still works at all (I haven't been able to get it to work). Is there anyway that this command could be updated to include poisoning powder, poisonous herbs and larger amounts of water (like mugs of ale, water skins, etc)? Also, would it be possible to integrate poisoning powder and poisonous herbs as ingredients that can be used with the cook skill?