I just ordered two big bags of this stuff, it's supposed to be pretty safe but I can't find any info on using it as kitty litter. Has any one read anything on it or tried it? I can get a BIG bag for $12, it's the size of a 50lb bag but only weights 12lbs and it's extreamly absorbent and I'm betting it's the same stuff as Pretty Litter which cost a whole lot more. Anyone???