Oh, they've played that game for months. It's not about finding a way to play with Eowyn for Mac (currently the favorite baby-dog game is "London Bridge"); it's his fascination with doors and a sense of agency. The only good current solution is blocking access to the crate which is obviously problematic.

On the plus side, he has learned both how to pour kibble from the big bag into her bowl and how to offer her food - palm out, slightly below her jaw. No sense of "doggie treats are a sometime food," though.