Check and see if you have a local mill that does chicken feed. I'm lucky I do. Ours has what they call layer mash. They also do pellets. The mash is the same ingredients just not ground up and pelletized. Basically some whole grains, some cracked, some legumes, some powder (vitamin/mineral additions) 'balanced feed'.I can get grains cheaper than chicken feed but I don't want to cause deficiencies.
My chickens are not real enthusiastic with the mash if I feed it dry. Fermented though they gobble it up. And sooo much easier and better to ferment. I posted pics here but can't find them. Stuff doesn't turn mush slop mess like pellets. Scoop it out water runs right off drains off nice like whole grains would.