I would never have thought that a cat could be allergic to the filler... Until the constant itching and redness on the paws began. In the article from https://pacoandpepper.shop/blo....g/best-cat-litter-fo I finally found a logical explanation - and, most importantly, a list of safe options. It's cool that they don't just write "take hypoallergenic", but specifically what and why is better. It really helped with the choice.