Wheat, corn, milo, oats, millet, and rice are all grains. Chickens can eat any grain raw and unprocessed without difficulty provided they have access to grit. I've fed raw rice to my birds many times.
If the brown rice is really rancid I'd compost it rather than feeding it out. If it's only a little off then I wouldn't hesitate to feed it.
If the brown rice is really rancid I'd compost it rather than feeding it out. If it's only a little off then I wouldn't hesitate to feed it.