A number of comments:
- Wood chips make excellent litter for a run; I also add leaves and needles each fall, currently 12"+ deep. 6 years in, zero maintenance, no smell, no waste accumulation.
- I used Blackjack 57 on the coop floor and 12" up the walls; two coats. Excellent product - six years and still working well. I clean out my coop bedding once a year so have an opportunity to examine condition and renew if needed.
- I use drop boards with PDZ under my roosts and pickup as near to daily as I am able. 90%+ of waste goes onto the drop boards, most of the rest goes into the run.
- I use coarse pine shavings as deep bedding in the coop, easily lasts a year if drop boards are properly used. I change it because of dust as it and any waste breaks down. Next to no smell
- The coop/run pictured above can be improved.
- The coop proper does not appear to have sufficient ventilation which is critical for healthy chickens. Most folks use the roof overhangs for this.
- The external nest boxes are exposed to the weather, you would be better to increase the overhangs so that they "cover" the nest box to provide shelter from rain and for you if you are collecting eggs in inclement weather. You would be much better off with a walk in coop!!!!!