Now, now, she didn't call him a rat specifically, no need to get hasty yet. And of course she wouldn't know; doesn't mean she shouldn't lack the tact to ask for the cat's name (at least in Ratigan's view).

But Ratigan can put aside his annoyance with her long enough to show off his precious pet. He pets Felicia, who in turn responds with a content purr, "Oh, she does."

He chuckles sardonically as releases one arm to pat his trusty bell within his coat pocket, "Let's just say I control her diet."