Hello, have you thought about sprouting grains. I wouldn't let the sprouts get too big. Maybe three days. Use 5 gallon bucket. Drill small holes in bottom. Place in another 5 gallon bucket and let grains soak for awhile. Then pull bucket up let drain. Repeat couple times a day. The grain will have little sprouts on them. The chickens will enjoy it especially in winter. It will save on feed.