I was thinking that cats outside love to go in sandboxes. Has anyone ever tried plain old sand (like playsand you can get at home depot for 3.00 for 50 lbs.) as cat litter instead of the store bought cat litter? Would there be anything healthwise that might affect a cat by using sand instead? I think it would be more natural to use either potting soil or sand for litter instead of commercial kitty litter. I tried wood shavings and although it keeps the small down the wood shavings tend to get everywhere. Has anyone tried sand?