Yes, we've done that in the past. It's not the best bedding in the world (Hemcore or Aubiose horse bedding is better), but since hens perch above the bedding rather than sleeping in it, it works well enough. You'll find that they do quite a lot of pooing in their sleep, so you'll end up with a pile of poo under each perching spot. The wood chips just help to dry that up a bit and make it easy to shovel up.