I'm going to go out on a limb and day I don't feed properly. I have a habit of not doing things "right".
That said, I feed 60-40 layer pellets and scratch semi- fermented, I leave some original ferment in the bucket, add feed, water to cover plus a little, use next day, repeat.
I've been feeding this for over 6 months and everyone seems to be doing fine. Before that, same thing, except at 70-30. My birds do have plenty of dirt to play in, and some grass plus table scraps and whatever else I toss in the run.
I used to ferment my feed. Problem is my silkies get it everywhere, in their beard and their crest. I like to keep them as clean as possible so it's easier to bathe before shows.
I totally know how it goes with silkies & fermented feed. I solved that by adding in additional dry feed to soak up excess water about 10 minutes before feeding. Solves most of the problem & still ferments mist of the feed.