Thank you,
@DobieLover - I appreciate you reviewing this and giving you input. I wish I had posted sooner!
I hope you and other could provide more feedback so that I can make changes now, if needed.
1. Sand in the run
My goal is (i) to not have smell or flies, since to coop is relatively near my house and my neighbor,
and (ii) to not scoop or clean the run
at all, if possible. I am in southern California and get very very little rain (like 2 weeks of rain per year) and I changed my sprinklers so that they do not hit the coop/run. Also, I want the option to keep them in the coop most all the time since we have predators, such as coyotes, that will come down from the mountains and scoop up small dogs, etc.
The information I found in BYC and the internet was that sand was the way to go because the poop would dry quickly, the chickens could still dig around, and they would get grit. I originally thought I might not have to scoop at all using sand.
I chose construction sand and pea gravel to provide varying texture, which would prevent compaction. I also put the non-woven landscape fabric at the bottom so that the water would drain down through the fabric and into the ground, while the fabric would also prevent dirt from migrating upward and mixing with the sand. The coop and run will eventually have a full shingled roof. All of this with the expectation that the run would stay dry or dry out quickly and prevent/reduce smell and flies.
I do not have anything against the natural process of composting (I maintain a compost bin for use around my garden), and I probably would have pursued that method if the coop was much further away from my house. However, it seemed that people using a dry organic matter like wood chips still need to clean out the run, have smell from the ammonia.
Please let me know if you still think that sand is not the material to use in view of my goals (no smell/flies, no scooping) and my setup (landscape fabric, constructions sand, little to no rain in a run with a roof)
2. Wire run floor
The 2X3 chicken wire on the run floor
The area around the coop has some tree roots and is elevated along one side, so I put the 2x3 wire underneath and extending about 16 inches around the perimeter. My thought was that the depth of the material in the run (e.g., sand) is almost 6 inches deep and the chickens would not be digging that deep.
Please let me know if you think chickens would dig 6 inches deep. If yes, could they still injure themselves after digging 6 inches and hitting the wire.
3. Ventilation
The hen house portion will have windows on three sides: (i) the north wall common to the run will have a 3.5x1 foot hinged window; (iii) the west exterior wall will have a 3.5x1 foot hinged window; and the east access doors will have a two 1x1 foot hinged windows. Additionally, the space between the rafter ends will left open and I intend to include some type of ridge opening (either a cupola or a ridge vent).
I hope that was not too much information but I would like to get as much feedback from members as possible before I proceed with my build.
Thank you all for any help or advice you may provide!
As background, so that anyone can see the general design for the roof, ventilation windows, and storage are, I am providing links to the (i)
California Coop, and (ii)
Chez Poulet.