Teachick, the standard way the big commercial companies make chickenfeed is to mix all the different ingredients they want in it and grind that up to a powder. That’s called mash.
If they want pellets, the wet it to make a paste and extrude it through dyes, flash dry it, and break it off into short pieces. That’s pellets.
If they want crumbles, they crush the pellets some, but not enough to take it back to mash.
Why do they do this? Glad you asked. Different styles of automatic feeders work better with different types of feed.
There is another issue or two. If that powdery mash stays dry, it can sort itself into the different ingredients based on specific density so the chickens might not get a balance diet. The pellets and crumbles keep it mixed up.
Also, if you cut the top beak off a chicken kept in crowded conditions so it can’t eat other chickens (called debeaking), they can’t handle pellets or crumbles really well. But they can handle damp mash really well.