It's very simple ... How many bantams?
Yes, you can use any type of feed but when using scratch or grains, the method is same although the supplies differ.
I feed FR crumbles/pellets as they both are easy to ferment. To start of with, depending on how many chickens (only bantams?) you have, 5 gal bucket maybe much but doable. When fermenting plastic or glass container, wood or plastic utensils and plastic, ceramic or glass feeding dish ... NO METAL as it has a chemical reaction with the fermenting.
Start with a plastic container, remember dry feed expands so make sure your container is large enough. Then you add water (ratio 1:1) mixing about 3x - 4x a day, you may want to cover the top with a mesh so it can breathe yet keep the bugs out (taffeta is what I use). You want a oatmeal consistency, too wet makes a mess, so add more water a little at a time & continue mixing for about 3 days. You'll see it bubbling and the smell of sourdough (yummy). Since you're in AZ it should go pretty fast (heat) ... I keep mine in the house to start, moving it outside to the patio secured from rats & stuff.
Feed a scoop at a time, refilling as needed. You'll get the feel of how much they eat per serving, I feed adults 2 x day, chickens don't eat at night. Everyday you use, replenish by just adding feed/water/mix. Don't know how long it stays "fresh" as you shouldn't run out as you add as you need, it also keeps the fermenting going.
You'll notice a difference in their pooping (less & less stink except the cecal still stinks) their feather shine & they absorb more the nutrients better. There's several article on the benefits but these are my favorites. The dust at the bottom of the bag, use it up, nothing goes to waste.
