Is there any type of cat litter that is dangerous? Do you have a favorite brand? i heard clumping cat litter is not safe but it works SOOO much better than regular clay because the pee actually comes out when i do my daily cleaning. I do change all the litter but not as frequently as just scooping so with the clumping it does not smell as fast because there is no or little pee that stays in the box after being scooped. So what do you think about clumping litter and other brands?