We put the old bedding in the veg. garden and burned it....if any nasties survived the fire, hopefully they will freeze. We'll keep the chickens away from that for a while.
We just realized we have a mite infestation. I'll buy some poultry dust, we'll clean out the coop, spray it down, dust it, dust the birds, put fresh pine flakes in. It looks like most people say to 'bag the old bedding and throw it away'. I hate to throw stuff into the land fill if it can be...