Corn has been the main stay of many animal feeds for years. A balanced chicken feed is just that: a blend of grains, (and yes, corn is the primary grain) with added protein, vitamins and minerals.
IMO, corn is not a villain. AS LONG AS IT'S balanced with other grains, vitamins, minerals and proteins.
The big issue about scratch grains: They detract from the bird's overall diet, b/c they do not have the additives. Scratch grain or corn are IIRC 8 - 11% protein. While a blended feed can be any where from 16 - 22% protein. Often, folks go overboard with scratch. A hand full in the morning, a hand full in the evening, and perhaps some low food value kitchen scraps over time will lead to a bird with fatty liver, and so much visceral fat that she can't push out an egg.
Exactly! That is what I am aiming for. Not just a bag of "complete."
The claim of a chicken feed being "complete" is similar to the diet guru's claims that their protein or diet shakes are "complete". A can of Ensure is "complete", and can be packed with protein and calories. But do any of those drinks provide what you or I would consider a good diet? They will sustain life, and even allow for weight gain, but the optimum diet comes from a variety of natural foods grown on healthy soil. Unfortunately, the average back yard flock owner (myself included) can not grow the flock's nutrients. So, we reach for that bag of balanced feed, and do what our resources allow to supplement that feed. (free range, sprouts, fermenting, extra greens, deep litter management)