Let me guess....you got totally flamed for not providing for your chickens at the expense of your mortgage/rent and food for your kids....
I started on the whole grain path due to my philosophies (no soy and no trust in what goes into anything that is in the form of a pellet or mash! A lot of garbage can be hidden in there, as all the recalls have proven) and my love of a good experiment but now the bad economy has really hit my family hard so I am very thankful that I am positioned to save and have the confidence that my animals are actually BETTER OFF NOW.
Whole grains are cheaper for most people...they are hard to get here! But cheaper than layer feed. In short, you need a carbohydrate source and a protein source. The carbohydrates should be a mix of at least 2-3 grains to balance nutrient issues in certain grains. The protein can be a number of things...what can you get ahold of? It can be field peas, soy if you are ok with that, meat, and bugs in a free-range situation. You can raise live protein with things like soldier fly larvae.
Or you can sprout barley. I do this and add animal protein as often as I can get it in the winter when no bugs are available. This means mashed bones from broth and catfood making, old milk and kefir, cooked eggs that were cracked or too soiled, fat scraps from rendering lard and suet.
You can get even more creative with foraging. I've picked and chopped dandelion greens for my more confined birds (broody hens and chicks, for example) as well as grass. Most veggie scraps will also be eaten, better if run through the food processor.
I recently got a lot of overripe sweet corn in the husks for my pigs....a group of young cockerels in my flock no longer comes to eat when I feed the rest of the flock. They eat corn right off the cob with the pigs.
Another thing I do that saves a tremendous amount of feed....almost cut my feed bill in half the first year I did this...I toss the feed to the flock twice a day, and that is what they get. Period. No food left in feeders for the vermin to take away and store underground somewhere. I scatter the grains a handful at a time until they lose enthusiasm. I make sure the shy ones get a chance before I stop.
If I will be late in the winter, I leave something for them like an apple or a squash or pumpkin to peck at in their coop where the goats can't steal it and the vermin aren't really interested.
And glean, glean, glean. There are opportunities all around you. Many farmers and gardeners hate to see stuff go to waste.