You can also buy huge bags of steam-rolled oats through a feed store. We feed that to our horses every day, but it is EXACTLY the same thing sold in the little round cartons - though maybe a bit more protein (insect parts - all oatmeal has them though and they won't hurt anyone once its cooked!!). Be careful though, in warm weather after a while you're likely to start to get little tiny bugs feasting on it too - don't know what they're called. I don't know of any solutions other than buying fresh grain and using rather quickly (except for freezing it to kill the bugs).