a .22 rd(post shtf) Deer,cattle, sheep, horses,hog, dogs, beavers, geese, THEY have enough meat to be worth a .22 rd, but many such critters are not that hard to snare, or to hit with a slingbow, or take withi a bola,either. Depending upon how desperate you are for flesh food, how skilled you are, how skittish the critters are, the terrain, etc, of course.
Another consideration is REMOVAL of animals that are taking YOUR game and birds. Skunks, cats, snakes, bluejays, crows, possums eat eggs, preflight birds. Cats. hawks, owls, weasel family are primary predators. ***** take your mussels,minnows, tadpoles and frogs. So when u get a chance to shoot such critters (quietly) that might well be worth a .22 rd to you, too. Even if you DON'T want their flesh.