Mine love all types of lettuce (NOT Iceberg), cucumber, peppers, coriander, aubergine, celery, they never get carrot as they had a lot of carrot in their old home and it's the equivalent of of chocolate in a human diet, they love kale but don't get it as its full of calcium and can lead to bladder stones (again they had a lot of this in their old home), They get the occasional bit of banana and melon skin which they absolutely adore.