My ladies are not ready yet for their coop and run but I am thinking ahead to the whole idea of scratch. The scratch that I've looked at seems generally fairly low in protein. I was wondering if it might be a better idea to mix my own "Scratch" with cracked corn but adding other things to add protein? I saw that Manna Pro has a Harvest mix that looked good and I was thinking of extending it by adding some cracked corn. But I'm not sure if I'm off on the wrong idea? Is the point of Scratch to give them something to do or is it really meant to supplement their nutrition?