Ok, what I thought I knew about scratch was this: 1. It is mostly grains. 2. It is a treat. 3. It is cheaper than feed. 4. It should be fed in moderation. When I went to buy some more chicken feed the farm store lady told me that she feeds 1 part scratch to two parts feed. She said that it gives them fiber to "keep them regular." And that you must feed it in addition to gravel and feed. I don't THINK this is true...but is she right? What is the function of scratch?