Romaine lettuce daily, then switch up the other two veggies every day, having them on a rotation is best. Kale, Dandelions (they can eat whole dandelion), Basil, Parsley, Cilantro, Celery, clovers and so much more are great for your rabbit! Just make sure you make sure something is safe for your rabbit before feeding it to them. Fruits and things like carrots should not be fed to them any more than once a week and even then should be less than the size of your finger as they are too sugary for them. Things like spinach and collard greens should be fed sparingly also due to them having high levels of oxalates. Avoid feeding your rabbit nuts or seeds and try feeding them the least amount of unnatural food as possible (ie. Pellets, pellets are good if you dont think your rabbit is getting all the nutrients they need so in that case Timothy non colored pellets are best. Unnatural treats however should be avoided). Hay should be unlimited to them, Timothy or orchard grass are best.