Always wash food first and don't feed plants from roadsides or that contain pesticides. Allow 5 - 7 days before making any other additions. Only give a small amount and wait for 24 hours, if your rabbit produces soft poo, withdraw the food and try with something else after everything has settled back to normal. Rabbits, like humans are all different and as such some may be unable to tolerate certain foods. When introducing any new food, always do so slowly over a few weeks to avoid digestive upsets. See 'What do rabbits eat?' for more information. The main part of a rabbit’s diet should be unlimited amounts of fresh hay (preferably Timothy or Meadow Hay), grass, and plenty of clean water available. Rabbits love their food and enjoy fresh fruits and vegetables as part of a balanced diet.
There has been so many threads lately asking is this or that was safe for rabbits so I thought this would be a good idea