He is stubborn. On the other hand, he isn't stupid. (In my head, since Summer and Scott would likely step in the way, his reaction would be "Lemme guess. We need to talk." And then go on to have a perfectly rational conversation about Ziggy. Who might even wander back from his corner because he's curious.)

(Which might even lead to a whole idea on how to demystify Dillon for Ziggy, and get Dillon used to the 'new' Ziggy - though that will still be hard. Flynn favors having Ziggy stay over with Dillon for a week so they can't avoid each other, but that's because my brain likes to go in weird directions.)