Here he is!
I bought these mini-bales of hay from BinkyBunny.com (one young oat, one orchard) and they are a perfect fit for Mick's cage. I wasn't sure if he was going to like them or not, but since he had his teeth done, he's been going to town on the oat bale. Apparently the only thing he doesn't like, though, is where I put it--I had it up against the right side of the cage and he keeps moving it out to where you see it. I'm tempted to switch it with the orchard bale (which is next to his throne and he hasn't touched it yet) to see what he'll do.