hello. I FINALLY mentioned to another chicken person, at a swap meet, about the barley problem. He already knew it. He said an old timer farmer told him that a long time ago.
To answer your question, sprout your wheat and sunflower seeds to make fodder. Your chickens will love you for it. Other grain possibilities are flax, rye, spelt, milet, triticale, fishmeal, and field peas. The field peas(which by the way are 23 percent protein) should be ground if possible, otherwise cover them with water to soften them. Don't forget kelp, molasses, applecider vinegar, mealworms. I have an organic farmers coop very near me, so most of these things are easily obtainable.