Cat litter is the one pet category where Turkey is already a serious European supplier rather than an emerging one, and the reason is geology plus geography. Turkey has substantial bentonite and sepiolite deposits, a mining and grinding industry built around them, and a road corridor into the EU that takes days rather than weeks. Litter is heavy, bulky and cheap per kilogram, which means freight is not a line item in the cost model, it largely is the cost model. On that arithmetic Turkey beats almost anywhere outside the EU and competes hard inside it.
The second reason is regulatory, and it is the mirror image of the food categories. Mineral cat litter is not feed and not an animal by-product, so none of the establishment listing, health certificate and border control post machinery that gates dog and cat food applies to it. A litter shipment moves as an ordinary industrial consignment. That is why European buyers who have never managed to source Turkish pet food often already have Turkish litter on their shelves without realising it.
What does apply is chemical and claims regulation, and it is where the real risk sits. Bentonite itself is a naturally occurring mineral, but a fragrance, a binder, a colourant or an antibacterial additive is a different matter, and the moment a pack claims to kill bacteria rather than to absorb odour it has made a biocidal claim with all the authorisation that implies. Get the claim wording and the additive list right before the artwork, and this is a straightforward category to buy.