Always on the hunt for cheap bedding myself. Wood shavings can be so expensive. I bought a cheap document shredder a few years back and we replaced the rabbit bedding with shredded documents and newspaper. That then gets composted via the chicken run. I take carbonaceous things where I can get them. Problem is getting enough paper to do it on a larger scale. The neighbours don't pick up their free newspaper, so I do that for them. Another neighbour sometimes brings us theirs. Perhaps you could be a drop of point for paper recycling! 😄