Vermin could become a serious problem. Adding to your list, I have these items in my stockpile: mouse traps rat traps small critter cages (i.e. racoons & squirrels)
Heck...if times get THAT tough, use the critter cages to catch your next meal. I've heard opossum is actually quite good. My father has a "turn of the century" cookbook with a recipe for opossum! We use to laugh at it, but if our ancestors survived off it, so could we! :)
I knew some VERY poor people growing up and they ate possum. I heard its really greasy so make sure you have immodium and "electrolyte replinisher". Ive heard the same about coon but this girl aint skeered!