I have 2 Maine Coon cats who are brothers. They're pretty large. I believe their conversation is as follows:
Meeko (older brother) to Dexter (younger brother): Did you wash behind your ears today?
Dexter: Yea I did. Did you?
Meeko: Of course I did.
Dexter. While let me check
Meeko: Go ahead and I'll check yours while you're at it.
Dexter: I don't care
As they're vigorously licking behind each others ears the conversation changes.
Meeko: You missed a spot
Dexter: So did you
Meeko: Listen smarty, I was cleaning behind my ears before you even had whiskers.
Dexter: Well, you'd think you'd know how by now then wouldn't you.
Meeko: I'll show you you little hairball.
Narrator: The ears go back. The eyes slit. The tail twitches. The dogs leave the room and I pop some popcorn

.
Narrotor: Next several minutes there are 35 pounds of fur, claws and fangs rolling around in my Den.
Meeko: Have you had enough?
Dexter: Never. Unless of course you have?
Meeko: Let's break for a nap and we'll take it up later.
Dexter: OK