I think for most their chickens free ranged in the past. This makes an enormous difference. A correct and balanced diet becomes less important if a chicken has access to forage. Often even poor forage will supple what the scraps and local crops don't.
Feed composition becomes critical for...
I did read your post. It's why I wrote the response I did.
If you had posted as an example, I want to supply these amino acids in these proportions and listed between 7 and 11 amino acids and asked what would supply them, and then listed the proportion of fat, salt, calcium vitamins and minerals...
This isn't meant to be rude but if you are on a forum asking about what ingredients you should use in a home made feed, you don't know enough about the subject to be thinking about it.
I'm sorry if this offends you.