i use sainsburys own brand ultra clumping litte. i had the same probs with my 2 cats. my baby cat norman hates even a slightly dirty litter tray so it was a nightmare finding a good comprimise. the litter i now use is a clay based litter so it forms easy to remove clumps when wee'd on. i remove the poops and clumps every day and top up with clean litter, and i completely change the litter once a week. its only about £4 too so pretty cheap

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mum to 2 kitty's and one bun