I use coffee grounds as bedding for my chicken coop. It cuts down on the poop smell, makes scooping more like cat litter and helps keep bugs out.

Once or twice a week I go by Starbucks and pick up used coffee grounds because they bag them separate from their other trash.

I put them out on a tarp to dry for a couple of days and then sift out the chunks (and leaves that landed in the mean time). I use a sifter that I got from Murdoch's that sits in a 5gallon buck which works really well.

Then I pour the fine sifted grounds in the coop. I used to mash up the leftover chunks and repeat the drying/sifting process, but as much coffee as Starbucks puts out, it's not an efficient use of my time I now just dump the chunks into the pen and let the girls scratch through it for enrichment.