so you just dump leaves from the yard and coffee grounds in their pen and let them "mulch" it up for you and then what?? im new to chickens, but I have a lot of leaves and quite a bit of coffee grounds so knowing something good to do with them would be helpful!! thanks for any info you might have.
In the run, a setup as described would do a much better job of cutting down on odors, absorbing excess moisture, and allowing chicken manure to compost than a bare run.
I've never tried mixing in coffee grinds, but may start. I put LOTS of leaves into my run, and find that there can still be odor when you have a long stretch of wet days (aka, the last 10 months here RI).