Cabbage on a rope is good (I also give them meat too, they love it. But some people don't like that so it's up to you). I used a baby formula can and cut a small hole in the lid and filled it with cracked corn. So they knock it around to get the corn out. I also have a compost pile in the run that they dig through. Also built a couple of boxes out of 2x6's or 8's and put dirt and planted clover, oats, and alfalfa in them and cover them with wire mesh so they can only eat what grows up through the wire. Not sure if any of that's what you meant but that's what I can think of right now.