Taking a page out of someone's mod for Minecraft, I have a suggestion for poop usage.
It could be boiled down to make poision (which could be bucketed or bottled). Splash it on some food, and give it to someone, and they lose SHP, HHP, or their lives. Higher quality poop comes from higher quality cows, and makes higher quality (more lethal) poison.
The catch: either poison could be detected with certain skills or traits, or it would be invisible to everyone and YOU could risk accidentally eating poisoned meat.
Other poisons could include:
*Flowers
*Mushrooms
*roots
*Rats or Frogs
*Spoiled Meat (if placed on a herbalist's table)
* Spoiled milk (herbalist's table)
* Harmesan cheese (the only cheese that hurts people).
All would have to be boiled in a cauldron to derive poison, and once again, put into a bottle or bucket.
Whaddya think?