I am trying to obtain wood chips from a local saw mill in the hopes of saving some cash. The saw mill seems agreeable but mentioned that at times their planar shavings and chips can contain black walnut and maybe cedar. As well, their regular chipper produces wet, not dried, chips with some leaves. Can anyone give a fairly comprehensive guide for non-dried, not-pine wood chip use? Can we use possibly wet and possibly cedar/walnut wood chips in the run, if not in the enclosed coop? What if the cedar/walnut amounts are rather dilute? Are there any other types of wood and leaves that chickens need to avoid? Thanks for any and all help.