If I may offer my 2 cents on this subject. Scratch, like silkiechicken said, is a mix of corn chops and various other grains mixed in a bag. It is considered a filler or treat because it does not contain any real nutrients. A regular old bag of layer pellets/crumbles has everything everybody needs. That's what all my animals get except the babies that get starter crumbles until I throw them out in the yard with the others.