1 part millet
2 part buckwheat
3/4 part amaranth
1/2 part flax
1 1/2 part wheat
1 1/2 part oats
1 1/2 part barley
2 parta field peas (black eyed is what I have access to, and I grind these roughly)
4 parts black oil sunflower seeds.
A ground kelp product for those minerals, occasionally DE but I'm not consistently committed to that.
The ratios are somewhat flexible. I do add water, probably a little more than 1 to 1, I don't measure. And I do ferment that mix.
Occasionally I offee some alfalfa. Of course I offer food scraps. On very cold mornings I warm the "mash" with some milk like hot cereal, and occasionally add butter.
I do attempt to do some composting with them, but I'm very much on the learning curve there.
I found this link useful https://afs.ca.uky.edu/poultry/nutrition