I HAVE THE PLASTIC LITTER GITTERS,OUTSIDE THE LITTER BOXES,THAT YOU GET AT THE DOLLAR STORE.
AND THEY SSEM,TO ATTRACT,QUITE A BIT,OF LITTER,WHICH IS GOOD,CONSIDERING,THE DIGGING,THAT MY CATS DO.

BUT THAT MAT,LOOKS LIKE A GREAT IDEA,AND I WILL SEE,IF I CAN FIND ONE.