We are first-year chicken farmers and have already made the switch to whole-grains to supplement our pasture-raised chickens. Whole grains are cleaner (they don't gum up the water) and more nutritious; cracked or ground grains begin to oxidize and lose their nutritive value. We also want to avoid any corn or soy product (unless we grow it ourselves) in order to avoid GM products. I have only begun to research what a balanced chicken diet consists of (as far as amino acids, protein percentage, etc.), but what I've read so far (and my chicken's current well-being) lead me to believe I'm on the right track.
We've started all our chicks out on medicated chick starter from our local ranching store chain; we didn't want to take chances, but with more experience we would like to start grinding our own chick feed. After about three (3) weeks, we begin to transition our chicks to steel-cut oats, some flax seed, heaps of alfalfa fines (since they're not on pasture yet; they love them) and a sprinkling of chick grit.
Our pullets and adult chickens are all on pasture in 'coopters' (a coop crossed with a tractor) and we feed them a mix of about five parts whole oats (hull on; Joel Salatin says the fiber is important to their diet), four parts black oil sunflower seeds (BOSS), and one part flax seeds, in addition to being on green pasture full-time. (Many sites say that pasture is merely supplemental feed, but the way my chickens eat their 'salad' each morning, I can't believe it's merely a 'supplement'.) They also receive a healthy portion of wheat soaked in goat milk or whey for 24-48 hours periodically (see
New Research on Feeding Value of Sprouted Wheat for Poultry, Manitoba Agriculture); they go crazy for it! As our girls are just starting to lay we're beginning to offer oyster-shell free-choice, but I imagine that the milk and whey add good calcium. (I've got a neighbor who says feeding whole grains to chickens decreases egg production but I've been unable to corroborate that anywhere; thoughts?)
We get our oats from a feed store (it's a horse feed) as well as our sunflower seeds (for wild birds); our flax we buy from WINCO. We buy it bulk and spend less than $0.50lb total. (The wheat was free; we just ask people on Craigslist for their old food storage.)
In the winter, we will put our chicken coopters over the garden and let them scratch through (and fertilize) the straw. We will continue to feed them the above-mentioned mix (or whatever iteration we are currently at), as well as alfalfa and farmed mealworms. Also, instead of weeding this year, we plan to let our pigweed (
amaranthus) an barley grass grow to seed, dry it, and feed it to them through the winter. (According to the
University of Kentucky, Amaranth seeds are high in protein and essential amino acids, although they must be heat-treated first; the dried leaves are also high in calcium, vitamin B3, protein, and methionine (which is '
the most limiting amino acid')).
As I said before, we're just starting out. We'll be looking to further diversify our chicken's diet to be balanced, relatively organic, GMO-free and affordable (our benchmark is the standard layer's mix at our local ranching stores--not expensive 'organic' mixes) as well as making our birds the most productive and happy. I hope this is helpful, and I welcome any suggestions.