We've tried all kinds of fruit and veggies. Ours really like most, but don't like citrus fruits. Apples and pears are their favorite fruits. Leafy lettuces, tomatoes, carrots, spinach leaves and more are on their list of veggies. I just tried yams, and they love them.

I keep a good layer of hay on top of the bedding. They eat it too, but they do stay away from their pee areas. They hay keeps the bedding in place as they run.

Not sure about the popcorning yet. My two tend to do it after they've had their Vit C supplement. They wheek anytime they think food is on the way.