All the questions that I had were answered in this article as well as some I hadn't thought of yet. Very good reading.
What an excellent article! Covered all bases. I was glad to see that you explained the reason why grandma and grandpa probably only fed the scratch. I've had to explain to many folks that didn't free range, that it wasn't healthy enough!
Good article to start on the basics for feeding chickens. There are a ton of links to dig deeper into the world of what to feed your chickens.