Remove all seeds as seeds are poisonous will KILL you bunny.
Good choices are like Apple, Banana, Carrots, Strawberries.
Keep to teaspoon size treats to avoid obesity in rabbits.
Allowing you rabbit to get fat can cause numerous health issues like:
* Diabetes
* Diet Deficiencies which is linked to many illnesses
* inability to eat their cecum, which produces vitamin B that they are unable to get from greens