Leah,
To add: They could be demanding better health care (12 lives, not 9), less sophisticated security systems, more clothing options, better weaponry. Names like Kitty Hilfiger, Tommy Guns, Cat Balues (think Tomcat, Tommy Hilfiger, Cat Ballou) etc. Yeah, it might be a great concept for another painting. Good luck!
Cats on Strike Furious Felines?
Just thinking out loud, but...
What if they were tabby-labbies (oompa-loompas) that worked at Catbury's (Cadbury's) Chocolate? They are on strike for more dairy milk, less cheesecake, and the purrrfect chocolatenip! Have fun with that idea :-))