does your buns use a litter box or no? My moms bun won't have anything to do with litter unless it is natural feeling. We found the best thing to use though a little expensive was Swheat Scoop Natural. It doesn't smell when used and it doesn't have a strong natural smell. Also we used a pine ltter too but I can't remember the name. That was not as good as Swheat but still good nonetheless. It's natural smell is a little bit stronger and it is much cheaper. Also it holds odor quite well.