I feed my laying hens and Point of lay pullets and their rooster 1 coffee can of laying crumble and 1/2 can of cracked corn. I started the cracked corn as a filler to help the crumble go farther. But my birds seem to be happier, and they are starting to lay better. I also added ACV to their water. For treats they get just about anything we can eat plus what ever bugs my son can find for them. My neighbors mow their lawns with bagger mowers and give them the clippings, and once a day they get guinea pig food. On occasion I free range them in the yard when I can supervise.
My babies I feed chick starter and for my baby ducks they get chick starter and niacin in their feed. I start treats at about 3 weeks old when they have been going outside under supervision and have access to fine sand in their diet.
Many people feed differant things. Start with the basics and work from there. Remember if they have no access to grit or calcium it needs to be added free choice. Im told my birds do not need grit because they are on the ground but I still offer it to them.