After seeing the topic about what do you use in your rabbits litter tray I thought i,d better make sure that everyone is aware of this . please read this link , I stopped using sawdust/woodshavings in cheekys living qaurters and littertray years ago after a warning from a few vets .
http://www.rabbit.org/journal/1/liver-disease.html
http://www.rabbit.org/journal/1/liver-disease.html