Last line says ‘fog juice’. Second word is obscured, but can be made out – you guys know you can click the comic to enlarge, right? =)
you just need to know that pearls before swine (another great comic, btw) has loads of bad puns, similar to the one jason’d set up.
i saw some strips where it was garfield minus garfield speech instead of this implementation, it was a lot more enjoyable - at least jon’s talking to SOMEONE! (albeit a normal non-sentient cat)