Thanks! I use food grade charcoal powder. But you can also use normal charcoal and grind it to powder, or use wood ash, just make sure it doesn’t have chemical/toxic residue.
I use 2% charcoal powder in the feed
You can check out articles about using charcoal here...
For me, I experimented and built an aviary-like run as a coop. I have 30 chickens in about 5,000 sqft coop area. During the day, the chickens spend time outdoor foraging (less poop inside).
That way, there's only few poop, mostly under where they sleep.
I also use deep litter method and add...