Timothy hay is the perferred hay to feed as it is high in fiber and low in calcium (calcium consumption must be watched in order to avoid health issues ). Alfalfa is higher in calcium and can be given to young, growing rabbits and mixed (in moderation) with the timothy hay, if the rabbit is a picky eater. Rabbits love variety, so mixing oat hay and orchard grass along with the timothy hay can also be done to encourage hay consumption.
Hay should be fresh and green, with long stalks. Some hay varieties are a duller green color, but should not look brown and dry. Proper storage of hay is very important as you don't want to encourage the growth of mold. Mold is toxic to rabbits. Hay is best stored in a cool, dry place, such as a closet. If you buy hat in small quantities, you can store in in the plastic bag it came in. Don't tie the bag shut, just fold the top over. Do not store hay in plastic sealed containers, as they don't allow for proper air circulation.
Make sure you wash the vegetables thoroughly and inspect them for any rotten areas before feeding to your rabbit.
Some suggested vegetables include Alfalfa, radish & clover sprouts, Basil, Beet greens (tops), Bok choy, Broccoli (mostly leaves/stems), Brussels sprouts, Carrot & carrot tops, Celery, Cilantro, Clover, Collard greens, Dandelion greens and flowers (no pesticides), Endive, Escarole, Green peppers, Mint.
Some suggested fruits include Apple, Blueberries, Melon, Orange (remove the peel), Papaya, Peach, Pear, Pineapple, Plums, Raspberries, Strawberries
Fruit, such as small pieces of banana or a blueberry make good treats. A raisin or dried cranberry can occasionally be offered. Stay away from the commercial rabbit treats such as yogurt drops, processed cereal puffs, seed mixes. These are not good for your rabbit.
