So you're saying we could set up a reliable fecal farm of human waste (please note that since they lack the human psyche they trust all of their senses equally, as opposed to our disproportionate dependence on sight) in a confined space to produce hundreds of bullets a day, and you foresee no problems? I envy your optimism for now, but my opinions will likely change when these ideas come crashing around you along with the walls of your fortress. Meanwhile, I will be far away, carving bolts and spinning plant fibers into strings.