Paw nation had a study on the most popular litter products out there in the market. With the expertise from several
renowned animal experts as well as cat owners, they have found the best products for clay, silica, corn, pine, wheat, soy, aspen and tea leaf litters.
Clay: Scoop Away
Silica: Tidy Cats Crystals
Corn: World's Best Cat Litter
Pine: Feline Pine
Wheat: Swheat Scoop
Soy: Close to Natrurenow
Aspen: Gentle Touch
Tea Leaves: Green Tea Leaves Clumping Cat Litter
Personally, I would not use Clay and Silica for my cats because I don't think they are the safest choice for our feline friends. I prefer products that are natural, non-toxic, no chemicals, and biodegradable.
To learn about their pros and cons, click here to read their report.