I actually burn my snips and strings (cotton or wool only) in my wood stove. Leaves no icky residue (like polyester) and burns down to a fine ash. This has been okay'd by my chimney sweep (who actually took some home for
his stove!) as being safe to do since I have a very basic stove. Just a thought...
My chickens always roosted in pine shavings. They dig a hole and plunk themselves down into it. They had access to roosting boxes, but preferred the shavings. My gals always laid their eggs in these holes. Never used straw or any other medium but shavings for them. They free ranged during the day and only slept in the chicken house at night.
So this was my 2 cents....