The basis for all feeding programs is the rabbit pellet. Buy pellets from a reputable producer and check the milling date on the label. You should only get what you can use up within 90 days of the milling date.
Besides pellets I feed timothy, alfalfa and oat hay. The hays are mostly fed free choice, with the exception of the alfalfa which should not be free fed to bucks. I also feed rolled oats with a bit of wheat germ oil and a dusting of wheat germ. I also feed fresh vegetables: lettuce, carrots, corn husks, and fresh grass. Feed fresh fruit carefully and remove the pits. Rabbits love a branch of alder or maple once in a while too.
Always keep fresh water available for your rabbits. It is very costly, production wise, to run out of water for your rabbits. Check automatic watering systems on a daily basis to avoid a stuck drinking tube.