I looove wood chip in the run. I just replaced most of the chip in the big run that had been there all winter. I kept looking for the poo but couldn't find it! The chickens stay clean and dry, and the old chip is great for the garden, and they love to dig around in it. I use cedar too, in the run. I use it when it has aged a little and not in enclosed spaces. You can get wood chips delivered for free from tree pruning companies. P. S. it rains a lot here!