Check out this website for gluetin free chicken food recipes. This may work for you.
https://curtissannmatlock.com/2012/08/09/gluten-free-chicken-feed-ii/
:hugs
For bedding in your nests I suggest rice straw. You should be able to obtain it easily since rice is grown in your area. I don't know about the feed problem. Can't Husband feed them for you? :)