I'd give them time. Mine will sometimes not eat something I put in the run at first, but if I leave it, it disappears. One thing was dried mariglds. I put whole dried up marigold plants in the run. They initially avoided them. But the next day, the dried flowers had all been picked off. I've put greens in the run that they initially ignore, but they get cleaned off the stalks with a bit of time. Some greens, like cabbage, cauliflower or broccoli leaves they go after immediately, but several things they reject at first but if nothing else shows up, they eat it. Kale, chard, lettuce. spinach, New Zealand spinach, zinnias, radishes, and those marigolds are pretty much in this latter group, though sometimes they will go after them immediately.