Here's what I did with my run (there is no coop):
- Large run area (More room for poop to spread and dried out, less smell)
- Direct Contact with soil (The soil microbes help breakdown the poop)
- Deep Litter Method (Give time for poop to decompose and mixed in the soil)
- Designed it like a greenhouse (Sunlight gets in and kills bacteria)
- Add plants, the more the better (Plants and soil microbes help breakdown poop)
- Spray Probiotic Water in the run once every 2-3 weeks (Add beneficial bacteria to the deep litter)
- Mix Probiotic and Charcoal Powder in the feed (Reduce Odor significantly)
- Free Range during the day (Less poop in the run/coop)
I have 30 chickens in 5,000 sqft run. So every night, the chickens sleep on the roosting bars in the run. During the day the sunlight will shine on the roosting area, so it will dry up their poop and disinfect it.
So far this method worked for me, I haven't cleaned the run in 6 months and it doesn't smell.
Here if you want to check out my chickens:
https://www.youtube.com/@sleepychicken19/videos
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