actually they are good for them but greens need to be the major part of their fresh diet, and that means romain lettuce, leaf lettuce, carrot tops, kale, collard greens, turnip greens, beet greens, swiss chard, bok choy, fresh grass, dandelion greens, plantain, queen annes lace, thats to name a few

veggies should only make up about 10-15% of diet, mine love celery carrots, broccoli, peppers, cauliflour, kalbarhi and occassionally a bit of apple, pear, grapes or orange.