What should you not feed a rabbit?

There are many foods that you should not feed a rabbit. For example, look at the list of known dangerous plants (linked below). If you have a rabbit, you might find it easier to consider what the rabbit should eat, and stick within those boundaries, instead of wondering what the rabbit can't eat (becuase the list is long!). What you should feed them also depends to some degree on what they like.

In general, rabbits shouldn't eat processed human foods, rotten or spoiled foods, seeds, nuts, dairy, meat products or byproducts, grains (with a very few exceptions), light-coloured lettuce, beans, tomato leaves, and dead grass, or processed sugars. Many vegetables, fruits, and rabbit foods are okay (at least in limited amounts), but it isn't recommended to experiment with anything else.