If you're thrifty and brew your own beer using grain, you can give the spent grain to your chicks. It's depleted, but still has some of the vitamins (B-vitamins), carbohydrates and protein. It is a bit high in fiber...so watch out! I wouldn't use this as a primary source of feed, but rather as a compliment to other feed. I have not done this myself. I stopped brewing years before I had chickens and I'm not about to start again. But, I do have a friend who feeds some spent barley to his small flock and swears by it. And, yess, they do look very healthy and vibrant.