We're new to chickens and this site as well. We really enjoy and appreciate all the information that comes across these posts. I've heard not to use cedar chips, or shavings for coop litter, but no mention of any other woods that may cause problems. The drought down here in AZ has left me with both a lifetime supply of oak firewood, as well as the brush and limbs that go with it. I have a tractor mounted wood chipper to clean up the left overs and was wondering if there were any reason I should not use the resulting chips to cover the floor of the coop? Thanks for any input.