All-flock feed is usually available either as crumble or as pellets.
Feed wastage with crumble is frequently a matter of feeder design. I like a traditional hanging metal feeder with a deep pan.
I feed all-flock with oystershell on the side because I have a mixed flock.
There's some seasonal variation in what forms of kitchen scraps they get, but that's the only seasonal change in diet that I offer.