Most vegetables are good for rabbits. Celery, bok choy, cucumber, romaine lettuce, brussels sprouts, zucchini, arugula, kale, spinach and and carrot tops are just a few good treats you can feed daily. You should feed fruits only a few times a week as they are higher in sugars. Good fruit options are berries, bananas, grapes, and watermelon. You can also give your rabbit red clover and dandelion greens (pesticide-free). Rabbits have sensitive digestive systems so offer new foods slowly. You may find he likes certain foods over others. Make sure you are only feeding 1-2 tablespoons of treats daily. Their are many other good fruits and vegetables you can give your bunny. Do your research on what if safe and what isn't. Never feed anything with dairy in it or meat in it.