Does anyone have any experience with using sand for litter? i found some literature suggesting that it works pretty well, but the text didnt actually go into detail. I live about 1000 miles away from a pine tree and not a mile from the beach LoL. obviously i wouldn't use beach sand, but that illustrates the difference in price locally. I would imagine sand and bird poop would kinda act like kitty litter and cat poop, but I'm just searching for some facts before I make my choice.