I have been feeding my chicks NatureWise brand pellett/crumble feed from the start, firstly on the starter, then on the grower, and eventually they will be on the layer. It is the only brand available for sale for miles, so it was an easy choice. However, I have not been able to locate a Scratch. I am new to chickens, and dont know what it looks like, brand names, etc. All I know is that I cant find anything called Scratch in the feed isles at my two local feed stores. My chickens are free fed the crumble, and then have access to a large grassy lot all day where they eat grass, dandelions, bugs etc. plus they get granite grit. Every other day or so I give them raw corn on the cob to peck at, or a piece of Organic Sprouted Squirelly Bread or some Organic greek yogurt (plain). With all of that, is Scratch necessary? I know it has cracked corn, but what else would it have in it? can I make with ingredients from the Bulk section of the grocery store?