Guido The Eviscerator(tm) says "Meeeoow," which is strikingly similar to the sound that means "Dad, I don't care. Rub my ears."
Vincent The Vicious Attack Kitten(tm) said "Brrrrrrrrring," which... oddly... also means "Dad, I don't care. Rub my ears."
The Shadow(tm) had no comment as she has no desire to converse with lowly humans.