You've got two choices when the SHTF. You can either starve to death or take your chances and eat your rice stash. I say keep buying rice for emergency purposes.

This deserves to be repeated:

US poultry industry has a disturbing habit of feeding arsenic to chickens. Arsenic, it turns out, helps control a common bug that infects chicken meat, and also gives chicken flesh a pink hue, which the industry thinks consumers want.

[link to www.motherjones.com]

Don't forget that chicken is also pumped full of hormones so that the birds will grow very quickly. All meats has nasty things in them. This is includes not just meat but almost everything on store shelves. Sad, but true.