Food they can eat.
As long as your rabbit is not dwarf, then lettuce is OKAY.
Other fruits and veggies you can give a try are : carrots (not too many, but my rabbit loves them as a treat!) , my rabbit loveees Marigolds, Dandelion flowers, kale ( DO not over feed them this! Use it verrrry very sparingly), basil, grass (as long as it is not treated with pesticides... so don't just take any old grass off of the side of the street. Pesticides are dangerous!), apples with no core... only a few slices, maybe just one , raspberries and strawberries
Hope this helped?