Rezo is, unfortunately for Wash, still a few paces behind him and is still regarding Wash, and now Wash’s cat, with scholarly interest.

Oh, that’s a surprise. So this man has a little animal assisting him. Moreover…

“You have a cat working for you?”

This is interesting primarily in a I-didn’t-know-that-was-a-thing kind of way: Rezo is quite familiar with the concept of working dogs, such as guide dogs, hunting dogs, herders, guard dogs, etc. But he’s under the impression that with cats you mostly just hope they’ll take care of vermin for you.