You've heard of tofu in food, but what about cat litter? Tofu cat litter is one of the newest natural types of cat litter. Cat litters are commonly made with clumping clay, silica, recycled paper, pine and corn kernels. Some cats have noses that are sensitive to dust, or dislike stepping on hard litter pellets though, which make these choices unsuitable. And as all cat owners know, with so many other factors to consider, choosing the right cat litter is a very important decision.