One of my cats started having a reaction to the filler - sneezing, scratching, constantly licking his paws. I thought it was food, but it turned out to be simpler. The article on the site https://pacoandpepper.shop/blo....g/best-cat-litter-fo turned out to be really useful - for the first time someone described properly how the filler can cause an allergy. It's especially cool that they offer a specific alternative - no dust, no odors, made from natural materials. I tried their version made from olive pits - so far neither the cat nor I have had a reaction. It really has become easier to breathe in the house.