All cat litters and renters are not created equal. Some renters are smarter
than others and some cat litters are flushable and some aren't. I would
make it an across the board rule that no cat litter can be flushed. It
isn't that big of a deal to put it in a plastic bag and place it in the
trash. Unfortunately when dealing with a broad spectrum of the public, you
often have to set basic guide lines.