Zippy, silly, lettuces are easy to tell apart - the darker green it is, the better. Iceberg is the stuff that looks like a pale green bowling ball. It's just not nutritious, but escarole, endive - most other lettuces are fine, if your bunny will eat them. Miss Hoppy recommends some nice bunches of parsley for starters - if you go to http://rabbit.org , you can find a good list of bunny-safe veggies.

Celery's also not great - it's just mostly water, not a whole lot of vitamins.