I pack a small suet cage with whatever greens I've got around and hang it in the run each morning. My three birds go straight to it, usually cleaning it out within a half hour. Their absolute favorite is butter lettuce, a local market sells small dark heads of it very inexpensively and the girls go berzerk for it. They will also eat kale, dandelions, carrot tops, napa cabbage and about any kind of sprouts. Yesterday I gave them beet greens...the reaction was lukewarm, but they finished them off eventually.