What about Feline Greenies? Is Filou allowed something like that? It might cut down on the need for cleaning. www.greenies.com

We used a cat-only clinic in Chicago. Because of the problems with anesthesia, they used ....I'll describe this as best I can....a very large fish tank into which they blew gas. Somewhat like the laughing gas dentist use. Far less anesthesia was used this way.