We used World’s Best for years. At one point we had a cat who was exhibiting some potty-related behavioral issues, and in desperation I brought in some clay litter (BoxieCat). 3 cats, 6 litterboxes¹: I replaced one litterbox with clay, and they all immediately stopped using the ones filled with World’s Best. I reduced it down to a single box of WB and they still wouldn’t use it.
I have no idea why, but it solved the potty problem.
¹: My first attempt to address the issue was to keep adding litterboxes so they had choice.
We used World’s Best for years. At one point we had a cat who was exhibiting some potty-related behavioral issues, and in desperation I brought in some clay litter (BoxieCat). 3 cats, 6 litterboxes¹: I replaced one litterbox with clay, and they all immediately stopped using the ones filled with World’s Best. I reduced it down to a single box of WB and they still wouldn’t use it.
I have no idea why, but it solved the potty problem.
¹: My first attempt to address the issue was to keep adding litterboxes so they had choice.