Well...there are a lot of recipes out there. I am soy-free so I use field peas instead of soy...which can be used raw though they still contain a good amount of anti-nutrients.
I started out having the feed mil grind it for me but I had to buy a minimum 300lb batch and I don't like it sitting around getting rancid. I ended up purchasing the grains and field peas (50 lb bags from the mill) and fish meal and mixing my own according to their recipe.
Mine is made primarily from (organic) field peas, corn, (oats &/or barley depending on costs), fish meal, calcarb, and Fertrell Nutribalancer. I make it at an "all-flock" protein and calcium level so that the whole flock can use it; the elders get free-feed calcium source and the youngers get extra protein from various sources.
I follow a very simple recipe for the main feed and then they get other things. I may use more variety in the basic feed if they didn't have other opportunities, but this is considered a good standard feed recipe if only corn, peas, fishmeal and the pre-mix is used.
In summer they free-range about 1/2 acre (will be expanding that next year). They also get some daily sunflower seeds and occasional raw meat and mealworms, and free access to the compost. In winter they get additional raw ground meat from time to time, sometimes chopped raw grass-fed liver (I don't use it if it's not from a local source whose animal husbandry I'm familiar with) some mealworms, sunflower seeds, kale or cilantro when it's on sale, lard-based "suit" cakes (for skin and feather health), sometimes dried nettles, etc. And usually not all those at any one time...just variety over time.
I actually grind mine in an old industrial "Vita-Mix" that my mom had at her house that wasn't being used. Otherwise I would have looked for a yard-sale blender with a glass container. I like it to be "cracked" pretty coarsly but it is still a "mash" type feed that is pretty powdery by nature. I like to soak or ferment it so that it all gets used...but I do offer dry as well.
Some good recipes and ideas are at this link...but, again,
it doesn't have to be fancy. Just the basics are okay.
http://www.themodernhomestead.us/article/Making-Poultry-Feeds-3.html
I know he lists a lot of things in his feed, but you don't have to get that extreme with ingredients.
You do have to pay attention to ratios for the every-day feed as there are percentages of certain grains that you should not go above. For example too much oats can cause loose stools, Buckwheat is can cause poto-sensitivity and needs to be used in moderation, etc .(I also have some sources that spell out those percentages if folks are concerned about that.)
There are other items that cannot be fed raw (soy and amaranth for example) as they are toxic.
But
I have a policy that if something is toxic if eaten raw it doesn't belong in a chicken's diet anyhow as I've never seen mine go out on range and build a fire to roast their food.....
The link above is part of a 3 part article that starts here:
http://www.themodernhomestead.us/article/Making-Poultry-Feeds-1.html
